| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "src/core/surface/call.h" |
| #include "src/core/channel/channel_stack.h" |
| #include "src/core/iomgr/alarm.h" |
| #include "src/core/support/string.h" |
| #include "src/core/surface/byte_buffer_queue.h" |
| #include "src/core/surface/channel.h" |
| #include "src/core/surface/completion_queue.h" |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <assert.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| typedef enum { REQ_INITIAL = 0, REQ_READY, REQ_DONE } req_state; |
| |
| typedef enum { |
| SEND_NOTHING, |
| SEND_INITIAL_METADATA, |
| SEND_BUFFERED_INITIAL_METADATA, |
| SEND_MESSAGE, |
| SEND_BUFFERED_MESSAGE, |
| SEND_TRAILING_METADATA_AND_FINISH, |
| SEND_FINISH |
| } send_action; |
| |
| typedef struct { |
| grpc_ioreq_completion_func on_complete; |
| void *user_data; |
| grpc_op_error status; |
| } completed_request; |
| |
| /* See request_set in grpc_call below for a description */ |
| #define REQSET_EMPTY 'X' |
| #define REQSET_DONE 'Y' |
| |
| #define MAX_SEND_INITIAL_METADATA_COUNT 3 |
| |
| typedef struct { |
| /* Overall status of the operation: starts OK, may degrade to |
| non-OK */ |
| grpc_op_error status; |
| /* Completion function to call at the end of the operation */ |
| grpc_ioreq_completion_func on_complete; |
| void *user_data; |
| /* a bit mask of which request ops are needed (1u << opid) */ |
| gpr_uint16 need_mask; |
| /* a bit mask of which request ops are now completed */ |
| gpr_uint16 complete_mask; |
| } reqinfo_master; |
| |
| /* Status data for a request can come from several sources; this |
| enumerates them all, and acts as a priority sorting for which |
| status to return to the application - earlier entries override |
| later ones */ |
| typedef enum { |
| /* Status came from the application layer overriding whatever |
| the wire says */ |
| STATUS_FROM_API_OVERRIDE = 0, |
| /* Status was created by some internal channel stack operation */ |
| STATUS_FROM_CORE, |
| /* Status came from 'the wire' - or somewhere below the surface |
| layer */ |
| STATUS_FROM_WIRE, |
| STATUS_SOURCE_COUNT |
| } status_source; |
| |
| typedef struct { |
| gpr_uint8 is_set; |
| grpc_status_code code; |
| grpc_mdstr *details; |
| } received_status; |
| |
| /* How far through the GRPC stream have we read? */ |
| typedef enum { |
| /* We are still waiting for initial metadata to complete */ |
| READ_STATE_INITIAL = 0, |
| /* We have gotten initial metadata, and are reading either |
| messages or trailing metadata */ |
| READ_STATE_GOT_INITIAL_METADATA, |
| /* The stream is closed for reading */ |
| READ_STATE_READ_CLOSED, |
| /* The stream is closed for reading & writing */ |
| READ_STATE_STREAM_CLOSED |
| } read_state; |
| |
| typedef enum { |
| WRITE_STATE_INITIAL = 0, |
| WRITE_STATE_STARTED, |
| WRITE_STATE_WRITE_CLOSED |
| } write_state; |
| |
| struct grpc_call { |
| grpc_completion_queue *cq; |
| grpc_channel *channel; |
| grpc_mdctx *metadata_context; |
| /* TODO(ctiller): share with cq if possible? */ |
| gpr_mu mu; |
| |
| /* how far through the stream have we read? */ |
| read_state read_state; |
| /* how far through the stream have we written? */ |
| write_state write_state; |
| /* client or server call */ |
| gpr_uint8 is_client; |
| /* is the alarm set */ |
| gpr_uint8 have_alarm; |
| /* are we currently performing a send operation */ |
| gpr_uint8 sending; |
| /* are we currently performing a recv operation */ |
| gpr_uint8 receiving; |
| /* are we currently completing requests */ |
| gpr_uint8 completing; |
| /* pairs with completed_requests */ |
| gpr_uint8 num_completed_requests; |
| /* are we currently reading a message? */ |
| gpr_uint8 reading_message; |
| /* flags with bits corresponding to write states allowing us to determine |
| what was sent */ |
| gpr_uint16 last_send_contains; |
| |
| /* Active ioreqs. |
| request_set and request_data contain one element per active ioreq |
| operation. |
| |
| request_set[op] is an integer specifying a set of operations to which |
| the request belongs: |
| - if it is < GRPC_IOREQ_OP_COUNT, then this operation is pending |
| completion, and the integer represents to which group of operations |
| the ioreq belongs. Each group is represented by one master, and the |
| integer in request_set is an index into masters to find the master |
| data. |
| - if it is REQSET_EMPTY, the ioreq op is inactive and available to be |
| started |
| - finally, if request_set[op] is REQSET_DONE, then the operation is |
| complete and unavailable to be started again |
| |
| request_data[op] is the request data as supplied by the initiator of |
| a request, and is valid iff request_set[op] <= GRPC_IOREQ_OP_COUNT. |
| The set fields are as per the request type specified by op. |
| |
| Finally, one element of masters is set per active _set_ of ioreq |
| operations. It describes work left outstanding, result status, and |
| what work to perform upon operation completion. As one ioreq of each |
| op type can be active at once, by convention we choose the first element |
| of the group to be the master -- ie the master of in-progress operation |
| op is masters[request_set[op]]. This allows constant time allocation |
| and a strong upper bound of a count of masters to be calculated. */ |
| gpr_uint8 request_set[GRPC_IOREQ_OP_COUNT]; |
| grpc_ioreq_data request_data[GRPC_IOREQ_OP_COUNT]; |
| reqinfo_master masters[GRPC_IOREQ_OP_COUNT]; |
| |
| /* Dynamic array of ioreq's that have completed: the count of |
| elements is queued in num_completed_requests. |
| This list is built up under lock(), and flushed entirely during |
| unlock(). |
| We know the upper bound of the number of elements as we can only |
| have one ioreq of each type active at once. */ |
| completed_request completed_requests[GRPC_IOREQ_OP_COUNT]; |
| /* Incoming buffer of messages */ |
| grpc_byte_buffer_queue incoming_queue; |
| /* Buffered read metadata waiting to be returned to the application. |
| Element 0 is initial metadata, element 1 is trailing metadata. */ |
| grpc_metadata_array buffered_metadata[2]; |
| /* All metadata received - unreffed at once at the end of the call */ |
| grpc_mdelem **owned_metadata; |
| size_t owned_metadata_count; |
| size_t owned_metadata_capacity; |
| |
| /* Received call statuses from various sources */ |
| received_status status[STATUS_SOURCE_COUNT]; |
| |
| /* Deadline alarm - if have_alarm is non-zero */ |
| grpc_alarm alarm; |
| |
| /* Call refcount - to keep the call alive during asynchronous operations */ |
| gpr_refcount internal_refcount; |
| |
| grpc_linked_mdelem send_initial_metadata[MAX_SEND_INITIAL_METADATA_COUNT]; |
| grpc_linked_mdelem status_link; |
| grpc_linked_mdelem details_link; |
| size_t send_initial_metadata_count; |
| gpr_timespec send_deadline; |
| |
| grpc_stream_op_buffer send_ops; |
| grpc_stream_op_buffer recv_ops; |
| grpc_stream_state recv_state; |
| |
| gpr_slice_buffer incoming_message; |
| gpr_uint32 incoming_message_length; |
| }; |
| |
| #define CALL_STACK_FROM_CALL(call) ((grpc_call_stack *)((call) + 1)) |
| #define CALL_FROM_CALL_STACK(call_stack) (((grpc_call *)(call_stack)) - 1) |
| #define CALL_ELEM_FROM_CALL(call, idx) \ |
| grpc_call_stack_element(CALL_STACK_FROM_CALL(call), idx) |
| #define CALL_FROM_TOP_ELEM(top_elem) \ |
| CALL_FROM_CALL_STACK(grpc_call_stack_from_top_element(top_elem)) |
| |
| #define SWAP(type, x, y) \ |
| do { \ |
| type temp = x; \ |
| x = y; \ |
| y = temp; \ |
| } while (0) |
| |
| static void do_nothing(void *ignored, grpc_op_error also_ignored) {} |
| static void set_deadline_alarm(grpc_call *call, gpr_timespec deadline); |
| static void call_on_done_recv(void *call, int success); |
| static void call_on_done_send(void *call, int success); |
| static int fill_send_ops(grpc_call *call, grpc_transport_op *op); |
| static void execute_op(grpc_call *call, grpc_transport_op *op); |
| static void recv_metadata(grpc_call *call, grpc_metadata_batch *metadata); |
| static void finish_read_ops(grpc_call *call); |
| static grpc_call_error grpc_call_cancel_with_status_internal( |
| grpc_call *c, grpc_status_code status, const char *description, |
| gpr_uint8 locked); |
| |
| grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq, |
| const void *server_transport_data, |
| grpc_mdelem **add_initial_metadata, |
| size_t add_initial_metadata_count, |
| gpr_timespec send_deadline) { |
| size_t i; |
| grpc_transport_op initial_op; |
| grpc_transport_op *initial_op_ptr = NULL; |
| grpc_channel_stack *channel_stack = grpc_channel_get_channel_stack(channel); |
| grpc_call *call = |
| gpr_malloc(sizeof(grpc_call) + channel_stack->call_stack_size); |
| memset(call, 0, sizeof(grpc_call)); |
| gpr_mu_init(&call->mu); |
| call->channel = channel; |
| call->cq = cq; |
| call->is_client = server_transport_data == NULL; |
| for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) { |
| call->request_set[i] = REQSET_EMPTY; |
| } |
| if (call->is_client) { |
| call->request_set[GRPC_IOREQ_SEND_TRAILING_METADATA] = REQSET_DONE; |
| call->request_set[GRPC_IOREQ_SEND_STATUS] = REQSET_DONE; |
| } |
| GPR_ASSERT(add_initial_metadata_count < MAX_SEND_INITIAL_METADATA_COUNT); |
| for (i = 0; i < add_initial_metadata_count; i++) { |
| call->send_initial_metadata[i].md = add_initial_metadata[i]; |
| } |
| call->send_initial_metadata_count = add_initial_metadata_count; |
| call->send_deadline = send_deadline; |
| grpc_channel_internal_ref(channel); |
| call->metadata_context = grpc_channel_get_metadata_context(channel); |
| grpc_sopb_init(&call->send_ops); |
| grpc_sopb_init(&call->recv_ops); |
| gpr_slice_buffer_init(&call->incoming_message); |
| /* dropped in destroy */ |
| gpr_ref_init(&call->internal_refcount, 1); |
| /* server hack: start reads immediately so we can get initial metadata. |
| TODO(ctiller): figure out a cleaner solution */ |
| if (!call->is_client) { |
| memset(&initial_op, 0, sizeof(initial_op)); |
| initial_op.recv_ops = &call->recv_ops; |
| initial_op.recv_state = &call->recv_state; |
| initial_op.on_done_recv = call_on_done_recv; |
| initial_op.recv_user_data = call; |
| call->receiving = 1; |
| GRPC_CALL_INTERNAL_REF(call, "receiving"); |
| initial_op_ptr = &initial_op; |
| } |
| grpc_call_stack_init(channel_stack, server_transport_data, initial_op_ptr, |
| CALL_STACK_FROM_CALL(call)); |
| if (gpr_time_cmp(send_deadline, gpr_inf_future) != 0) { |
| set_deadline_alarm(call, send_deadline); |
| } |
| return call; |
| } |
| |
| void grpc_call_set_completion_queue(grpc_call *call, |
| grpc_completion_queue *cq) { |
| call->cq = cq; |
| } |
| |
| grpc_completion_queue *grpc_call_get_completion_queue(grpc_call *call) { |
| return call->cq; |
| } |
| |
| #ifdef GRPC_CALL_REF_COUNT_DEBUG |
| void grpc_call_internal_ref(grpc_call *c, const char *reason) { |
| gpr_log(GPR_DEBUG, "CALL: ref %p %d -> %d [%s]", c, |
| c->internal_refcount.count, c->internal_refcount.count + 1, reason); |
| #else |
| void grpc_call_internal_ref(grpc_call *c) { |
| #endif |
| gpr_ref(&c->internal_refcount); |
| } |
| |
| static void destroy_call(void *call, int ignored_success) { |
| size_t i; |
| grpc_call *c = call; |
| grpc_call_stack_destroy(CALL_STACK_FROM_CALL(c)); |
| grpc_channel_internal_unref(c->channel); |
| gpr_mu_destroy(&c->mu); |
| for (i = 0; i < STATUS_SOURCE_COUNT; i++) { |
| if (c->status[i].details) { |
| grpc_mdstr_unref(c->status[i].details); |
| } |
| } |
| for (i = 0; i < c->owned_metadata_count; i++) { |
| grpc_mdelem_unref(c->owned_metadata[i]); |
| } |
| gpr_free(c->owned_metadata); |
| for (i = 0; i < GPR_ARRAY_SIZE(c->buffered_metadata); i++) { |
| gpr_free(c->buffered_metadata[i].metadata); |
| } |
| for (i = 0; i < c->send_initial_metadata_count; i++) { |
| grpc_mdelem_unref(c->send_initial_metadata[i].md); |
| } |
| grpc_sopb_destroy(&c->send_ops); |
| grpc_sopb_destroy(&c->recv_ops); |
| grpc_bbq_destroy(&c->incoming_queue); |
| gpr_slice_buffer_destroy(&c->incoming_message); |
| gpr_free(c); |
| } |
| |
| #ifdef GRPC_CALL_REF_COUNT_DEBUG |
| void grpc_call_internal_unref(grpc_call *c, const char *reason, |
| int allow_immediate_deletion) { |
| gpr_log(GPR_DEBUG, "CALL: unref %p %d -> %d [%s]", c, |
| c->internal_refcount.count, c->internal_refcount.count - 1, reason); |
| #else |
| void grpc_call_internal_unref(grpc_call *c, int allow_immediate_deletion) { |
| #endif |
| if (gpr_unref(&c->internal_refcount)) { |
| if (allow_immediate_deletion) { |
| destroy_call(c, 1); |
| } else { |
| grpc_iomgr_add_callback(destroy_call, c); |
| } |
| } |
| } |
| |
| static void set_status_code(grpc_call *call, status_source source, |
| gpr_uint32 status) { |
| int flush; |
| |
| call->status[source].is_set = 1; |
| call->status[source].code = status; |
| |
| if (call->is_client) { |
| flush = status == GRPC_STATUS_CANCELLED; |
| } else { |
| flush = status != GRPC_STATUS_OK; |
| } |
| |
| if (flush && !grpc_bbq_empty(&call->incoming_queue)) { |
| grpc_bbq_flush(&call->incoming_queue); |
| } |
| } |
| |
| static void set_status_details(grpc_call *call, status_source source, |
| grpc_mdstr *status) { |
| if (call->status[source].details != NULL) { |
| grpc_mdstr_unref(call->status[source].details); |
| } |
| call->status[source].details = status; |
| } |
| |
| static int is_op_live(grpc_call *call, grpc_ioreq_op op) { |
| gpr_uint8 set = call->request_set[op]; |
| reqinfo_master *master; |
| if (set >= GRPC_IOREQ_OP_COUNT) return 0; |
| master = &call->masters[set]; |
| return (master->complete_mask & (1u << op)) == 0; |
| } |
| |
| static void lock(grpc_call *call) { gpr_mu_lock(&call->mu); } |
| |
| static int need_more_data(grpc_call *call) { |
| return is_op_live(call, GRPC_IOREQ_RECV_INITIAL_METADATA) || |
| is_op_live(call, GRPC_IOREQ_RECV_MESSAGE) || |
| is_op_live(call, GRPC_IOREQ_RECV_TRAILING_METADATA) || |
| is_op_live(call, GRPC_IOREQ_RECV_STATUS) || |
| is_op_live(call, GRPC_IOREQ_RECV_STATUS_DETAILS) || |
| (is_op_live(call, GRPC_IOREQ_RECV_CLOSE) && |
| grpc_bbq_empty(&call->incoming_queue)) || |
| (call->write_state == WRITE_STATE_INITIAL && !call->is_client && |
| call->read_state != READ_STATE_STREAM_CLOSED); |
| } |
| |
| static void unlock(grpc_call *call) { |
| grpc_transport_op op; |
| completed_request completed_requests[GRPC_IOREQ_OP_COUNT]; |
| int completing_requests = 0; |
| int start_op = 0; |
| int i; |
| |
| memset(&op, 0, sizeof(op)); |
| |
| if (!call->receiving && need_more_data(call)) { |
| op.recv_ops = &call->recv_ops; |
| op.recv_state = &call->recv_state; |
| op.on_done_recv = call_on_done_recv; |
| op.recv_user_data = call; |
| call->receiving = 1; |
| GRPC_CALL_INTERNAL_REF(call, "receiving"); |
| start_op = 1; |
| } |
| |
| if (!call->sending) { |
| if (fill_send_ops(call, &op)) { |
| call->sending = 1; |
| GRPC_CALL_INTERNAL_REF(call, "sending"); |
| start_op = 1; |
| } |
| } |
| |
| if (!call->completing && call->num_completed_requests != 0) { |
| completing_requests = call->num_completed_requests; |
| memcpy(completed_requests, call->completed_requests, |
| sizeof(completed_requests)); |
| call->num_completed_requests = 0; |
| call->completing = 1; |
| GRPC_CALL_INTERNAL_REF(call, "completing"); |
| } |
| |
| gpr_mu_unlock(&call->mu); |
| |
| if (start_op) { |
| execute_op(call, &op); |
| } |
| |
| if (completing_requests > 0) { |
| for (i = 0; i < completing_requests; i++) { |
| completed_requests[i].on_complete(call, completed_requests[i].status, |
| completed_requests[i].user_data); |
| } |
| lock(call); |
| call->completing = 0; |
| unlock(call); |
| GRPC_CALL_INTERNAL_UNREF(call, "completing", 0); |
| } |
| } |
| |
| static void get_final_status(grpc_call *call, grpc_ioreq_data out) { |
| int i; |
| for (i = 0; i < STATUS_SOURCE_COUNT; i++) { |
| if (call->status[i].is_set) { |
| out.recv_status.set_value(call->status[i].code, |
| out.recv_status.user_data); |
| return; |
| } |
| } |
| if (call->is_client) { |
| out.recv_status.set_value(GRPC_STATUS_UNKNOWN, out.recv_status.user_data); |
| } else { |
| out.recv_status.set_value(GRPC_STATUS_OK, out.recv_status.user_data); |
| } |
| } |
| |
| static void get_final_details(grpc_call *call, grpc_ioreq_data out) { |
| int i; |
| for (i = 0; i < STATUS_SOURCE_COUNT; i++) { |
| if (call->status[i].is_set) { |
| if (call->status[i].details) { |
| gpr_slice details = call->status[i].details->slice; |
| size_t len = GPR_SLICE_LENGTH(details); |
| if (len + 1 > *out.recv_status_details.details_capacity) { |
| *out.recv_status_details.details_capacity = GPR_MAX( |
| len + 1, *out.recv_status_details.details_capacity * 3 / 2); |
| *out.recv_status_details.details = |
| gpr_realloc(*out.recv_status_details.details, |
| *out.recv_status_details.details_capacity); |
| } |
| memcpy(*out.recv_status_details.details, GPR_SLICE_START_PTR(details), |
| len); |
| (*out.recv_status_details.details)[len] = 0; |
| } else { |
| goto no_details; |
| } |
| return; |
| } |
| } |
| |
| no_details: |
| if (0 == *out.recv_status_details.details_capacity) { |
| *out.recv_status_details.details_capacity = 8; |
| *out.recv_status_details.details = |
| gpr_malloc(*out.recv_status_details.details_capacity); |
| } |
| **out.recv_status_details.details = 0; |
| } |
| |
| static void finish_live_ioreq_op(grpc_call *call, grpc_ioreq_op op, |
| grpc_op_error status) { |
| completed_request *cr; |
| gpr_uint8 master_set = call->request_set[op]; |
| reqinfo_master *master; |
| size_t i; |
| /* ioreq is live: we need to do something */ |
| master = &call->masters[master_set]; |
| master->complete_mask |= 1u << op; |
| if (status != GRPC_OP_OK) { |
| master->status = status; |
| } |
| if (master->complete_mask == master->need_mask) { |
| for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) { |
| if (call->request_set[i] != master_set) { |
| continue; |
| } |
| call->request_set[i] = REQSET_DONE; |
| switch ((grpc_ioreq_op)i) { |
| case GRPC_IOREQ_RECV_MESSAGE: |
| case GRPC_IOREQ_SEND_MESSAGE: |
| if (master->status == GRPC_OP_OK) { |
| call->request_set[i] = REQSET_EMPTY; |
| } else { |
| call->write_state = WRITE_STATE_WRITE_CLOSED; |
| } |
| break; |
| case GRPC_IOREQ_RECV_CLOSE: |
| case GRPC_IOREQ_SEND_INITIAL_METADATA: |
| case GRPC_IOREQ_SEND_TRAILING_METADATA: |
| case GRPC_IOREQ_SEND_STATUS: |
| case GRPC_IOREQ_SEND_CLOSE: |
| break; |
| case GRPC_IOREQ_RECV_STATUS: |
| get_final_status(call, call->request_data[GRPC_IOREQ_RECV_STATUS]); |
| break; |
| case GRPC_IOREQ_RECV_STATUS_DETAILS: |
| get_final_details(call, |
| call->request_data[GRPC_IOREQ_RECV_STATUS_DETAILS]); |
| break; |
| case GRPC_IOREQ_RECV_INITIAL_METADATA: |
| SWAP(grpc_metadata_array, call->buffered_metadata[0], |
| *call->request_data[GRPC_IOREQ_RECV_INITIAL_METADATA] |
| .recv_metadata); |
| break; |
| case GRPC_IOREQ_RECV_TRAILING_METADATA: |
| SWAP(grpc_metadata_array, call->buffered_metadata[1], |
| *call->request_data[GRPC_IOREQ_RECV_TRAILING_METADATA] |
| .recv_metadata); |
| break; |
| case GRPC_IOREQ_OP_COUNT: |
| abort(); |
| break; |
| } |
| } |
| cr = &call->completed_requests[call->num_completed_requests++]; |
| cr->status = master->status; |
| cr->on_complete = master->on_complete; |
| cr->user_data = master->user_data; |
| } |
| } |
| |
| static void finish_ioreq_op(grpc_call *call, grpc_ioreq_op op, |
| grpc_op_error status) { |
| if (is_op_live(call, op)) { |
| finish_live_ioreq_op(call, op, status); |
| } |
| } |
| |
| static void call_on_done_send(void *pc, int success) { |
| grpc_call *call = pc; |
| grpc_op_error error = success ? GRPC_OP_OK : GRPC_OP_ERROR; |
| lock(call); |
| if (call->last_send_contains & (1 << GRPC_IOREQ_SEND_INITIAL_METADATA)) { |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_INITIAL_METADATA, error); |
| } |
| if (call->last_send_contains & (1 << GRPC_IOREQ_SEND_MESSAGE)) { |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_MESSAGE, error); |
| } |
| if (call->last_send_contains & (1 << GRPC_IOREQ_SEND_CLOSE)) { |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_TRAILING_METADATA, error); |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_STATUS, error); |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_CLOSE, GRPC_OP_OK); |
| } |
| call->last_send_contains = 0; |
| call->sending = 0; |
| unlock(call); |
| GRPC_CALL_INTERNAL_UNREF(call, "sending", 0); |
| } |
| |
| static void finish_message(grpc_call *call) { |
| /* TODO(ctiller): this could be a lot faster if coded directly */ |
| grpc_byte_buffer *byte_buffer = grpc_byte_buffer_create( |
| call->incoming_message.slices, call->incoming_message.count); |
| gpr_slice_buffer_reset_and_unref(&call->incoming_message); |
| |
| grpc_bbq_push(&call->incoming_queue, byte_buffer); |
| |
| GPR_ASSERT(call->incoming_message.count == 0); |
| call->reading_message = 0; |
| } |
| |
| static int begin_message(grpc_call *call, grpc_begin_message msg) { |
| /* can't begin a message when we're still reading a message */ |
| if (call->reading_message) { |
| char *message = NULL; |
| gpr_asprintf( |
| &message, "Message terminated early; read %d bytes, expected %d", |
| (int)call->incoming_message.length, (int)call->incoming_message_length); |
| grpc_call_cancel_with_status_internal(call, GRPC_STATUS_INVALID_ARGUMENT, |
| message, 1); |
| gpr_free(message); |
| return 0; |
| } |
| /* stash away parameters, and prepare for incoming slices */ |
| if (msg.length > grpc_channel_get_max_message_length(call->channel)) { |
| char *message = NULL; |
| gpr_asprintf( |
| &message, |
| "Maximum message length of %d exceeded by a message of length %d", |
| grpc_channel_get_max_message_length(call->channel), msg.length); |
| grpc_call_cancel_with_status_internal(call, GRPC_STATUS_INVALID_ARGUMENT, |
| message, 1); |
| gpr_free(message); |
| return 0; |
| } else if (msg.length > 0) { |
| call->reading_message = 1; |
| call->incoming_message_length = msg.length; |
| return 1; |
| } else { |
| finish_message(call); |
| return 1; |
| } |
| } |
| |
| static int add_slice_to_message(grpc_call *call, gpr_slice slice) { |
| if (GPR_SLICE_LENGTH(slice) == 0) { |
| gpr_slice_unref(slice); |
| return 1; |
| } |
| /* we have to be reading a message to know what to do here */ |
| if (!call->reading_message) { |
| grpc_call_cancel_with_status_internal( |
| call, GRPC_STATUS_INVALID_ARGUMENT, |
| "Received payload data while not reading a message", 1); |
| return 0; |
| } |
| /* append the slice to the incoming buffer */ |
| gpr_slice_buffer_add(&call->incoming_message, slice); |
| if (call->incoming_message.length > call->incoming_message_length) { |
| /* if we got too many bytes, complain */ |
| char *message = NULL; |
| gpr_asprintf( |
| &message, "Receiving message overflow; read %d bytes, expected %d", |
| (int)call->incoming_message.length, (int)call->incoming_message_length); |
| grpc_call_cancel_with_status_internal(call, GRPC_STATUS_INVALID_ARGUMENT, |
| message, 1); |
| gpr_free(message); |
| return 0; |
| } else if (call->incoming_message.length == call->incoming_message_length) { |
| finish_message(call); |
| return 1; |
| } else { |
| return 1; |
| } |
| } |
| |
| static void call_on_done_recv(void *pc, int success) { |
| grpc_call *call = pc; |
| size_t i; |
| lock(call); |
| call->receiving = 0; |
| if (success) { |
| for (i = 0; success && i < call->recv_ops.nops; i++) { |
| grpc_stream_op *op = &call->recv_ops.ops[i]; |
| switch (op->type) { |
| case GRPC_NO_OP: |
| break; |
| case GRPC_OP_METADATA: |
| recv_metadata(call, &op->data.metadata); |
| break; |
| case GRPC_OP_BEGIN_MESSAGE: |
| success = begin_message(call, op->data.begin_message); |
| break; |
| case GRPC_OP_SLICE: |
| success = add_slice_to_message(call, op->data.slice); |
| break; |
| } |
| } |
| if (call->recv_state == GRPC_STREAM_RECV_CLOSED) { |
| GPR_ASSERT(call->read_state <= READ_STATE_READ_CLOSED); |
| call->read_state = READ_STATE_READ_CLOSED; |
| } |
| if (call->recv_state == GRPC_STREAM_CLOSED) { |
| GPR_ASSERT(call->read_state <= READ_STATE_STREAM_CLOSED); |
| call->read_state = READ_STATE_STREAM_CLOSED; |
| if (call->have_alarm) { |
| grpc_alarm_cancel(&call->alarm); |
| call->have_alarm = 0; |
| } |
| } |
| finish_read_ops(call); |
| } else { |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_MESSAGE, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_STATUS, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_CLOSE, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_TRAILING_METADATA, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_INITIAL_METADATA, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_STATUS_DETAILS, GRPC_OP_ERROR); |
| } |
| call->recv_ops.nops = 0; |
| unlock(call); |
| |
| GRPC_CALL_INTERNAL_UNREF(call, "receiving", 0); |
| } |
| |
| static grpc_mdelem_list chain_metadata_from_app(grpc_call *call, size_t count, |
| grpc_metadata *metadata) { |
| size_t i; |
| grpc_mdelem_list out; |
| if (count == 0) { |
| out.head = out.tail = NULL; |
| return out; |
| } |
| for (i = 0; i < count; i++) { |
| grpc_metadata *md = &metadata[i]; |
| grpc_metadata *next_md = (i == count - 1) ? NULL : &metadata[i + 1]; |
| grpc_metadata *prev_md = (i == 0) ? NULL : &metadata[i - 1]; |
| grpc_linked_mdelem *l = (grpc_linked_mdelem *)&md->internal_data; |
| GPR_ASSERT(sizeof(grpc_linked_mdelem) == sizeof(md->internal_data)); |
| l->md = grpc_mdelem_from_string_and_buffer(call->metadata_context, md->key, |
| (const gpr_uint8 *)md->value, |
| md->value_length); |
| l->next = next_md ? (grpc_linked_mdelem *)&next_md->internal_data : NULL; |
| l->prev = prev_md ? (grpc_linked_mdelem *)&prev_md->internal_data : NULL; |
| } |
| out.head = (grpc_linked_mdelem *)&(metadata[0].internal_data); |
| out.tail = (grpc_linked_mdelem *)&(metadata[count - 1].internal_data); |
| return out; |
| } |
| |
| /* Copy the contents of a byte buffer into stream ops */ |
| static void copy_byte_buffer_to_stream_ops(grpc_byte_buffer *byte_buffer, |
| grpc_stream_op_buffer *sopb) { |
| size_t i; |
| |
| switch (byte_buffer->type) { |
| case GRPC_BB_SLICE_BUFFER: |
| for (i = 0; i < byte_buffer->data.slice_buffer.count; i++) { |
| gpr_slice slice = byte_buffer->data.slice_buffer.slices[i]; |
| gpr_slice_ref(slice); |
| grpc_sopb_add_slice(sopb, slice); |
| } |
| break; |
| } |
| } |
| |
| static int fill_send_ops(grpc_call *call, grpc_transport_op *op) { |
| grpc_ioreq_data data; |
| grpc_metadata_batch mdb; |
| size_t i; |
| char status_str[GPR_LTOA_MIN_BUFSIZE]; |
| GPR_ASSERT(op->send_ops == NULL); |
| |
| switch (call->write_state) { |
| case WRITE_STATE_INITIAL: |
| if (!is_op_live(call, GRPC_IOREQ_SEND_INITIAL_METADATA)) { |
| break; |
| } |
| data = call->request_data[GRPC_IOREQ_SEND_INITIAL_METADATA]; |
| mdb.list = chain_metadata_from_app(call, data.send_metadata.count, |
| data.send_metadata.metadata); |
| mdb.garbage.head = mdb.garbage.tail = NULL; |
| mdb.deadline = call->send_deadline; |
| for (i = 0; i < call->send_initial_metadata_count; i++) { |
| grpc_metadata_batch_link_head(&mdb, &call->send_initial_metadata[i]); |
| } |
| grpc_sopb_add_metadata(&call->send_ops, mdb); |
| op->send_ops = &call->send_ops; |
| op->bind_pollset = grpc_cq_pollset(call->cq); |
| call->last_send_contains |= 1 << GRPC_IOREQ_SEND_INITIAL_METADATA; |
| call->write_state = WRITE_STATE_STARTED; |
| call->send_initial_metadata_count = 0; |
| /* fall through intended */ |
| case WRITE_STATE_STARTED: |
| if (is_op_live(call, GRPC_IOREQ_SEND_MESSAGE)) { |
| data = call->request_data[GRPC_IOREQ_SEND_MESSAGE]; |
| grpc_sopb_add_begin_message( |
| &call->send_ops, grpc_byte_buffer_length(data.send_message), 0); |
| copy_byte_buffer_to_stream_ops(data.send_message, &call->send_ops); |
| op->send_ops = &call->send_ops; |
| call->last_send_contains |= 1 << GRPC_IOREQ_SEND_MESSAGE; |
| } |
| if (is_op_live(call, GRPC_IOREQ_SEND_CLOSE)) { |
| op->is_last_send = 1; |
| op->send_ops = &call->send_ops; |
| call->last_send_contains |= 1 << GRPC_IOREQ_SEND_CLOSE; |
| call->write_state = WRITE_STATE_WRITE_CLOSED; |
| if (!call->is_client) { |
| /* send trailing metadata */ |
| data = call->request_data[GRPC_IOREQ_SEND_TRAILING_METADATA]; |
| mdb.list = chain_metadata_from_app(call, data.send_metadata.count, |
| data.send_metadata.metadata); |
| mdb.garbage.head = mdb.garbage.tail = NULL; |
| mdb.deadline = gpr_inf_future; |
| /* send status */ |
| /* TODO(ctiller): cache common status values */ |
| data = call->request_data[GRPC_IOREQ_SEND_STATUS]; |
| gpr_ltoa(data.send_status.code, status_str); |
| grpc_metadata_batch_add_tail( |
| &mdb, &call->status_link, |
| grpc_mdelem_from_metadata_strings( |
| call->metadata_context, |
| grpc_mdstr_ref(grpc_channel_get_status_string(call->channel)), |
| grpc_mdstr_from_string(call->metadata_context, status_str))); |
| if (data.send_status.details) { |
| grpc_metadata_batch_add_tail( |
| &mdb, &call->details_link, |
| grpc_mdelem_from_metadata_strings( |
| call->metadata_context, |
| grpc_mdstr_ref( |
| grpc_channel_get_message_string(call->channel)), |
| grpc_mdstr_from_string(call->metadata_context, |
| data.send_status.details))); |
| } |
| grpc_sopb_add_metadata(&call->send_ops, mdb); |
| } |
| } |
| break; |
| case WRITE_STATE_WRITE_CLOSED: |
| break; |
| } |
| if (op->send_ops) { |
| op->on_done_send = call_on_done_send; |
| op->send_user_data = call; |
| } |
| return op->send_ops != NULL; |
| } |
| |
| static grpc_call_error start_ioreq_error(grpc_call *call, |
| gpr_uint32 mutated_ops, |
| grpc_call_error ret) { |
| size_t i; |
| for (i = 0; i < GRPC_IOREQ_OP_COUNT; i++) { |
| if (mutated_ops & (1u << i)) { |
| call->request_set[i] = REQSET_EMPTY; |
| } |
| } |
| return ret; |
| } |
| |
| static void finish_read_ops(grpc_call *call) { |
| int empty; |
| |
| if (is_op_live(call, GRPC_IOREQ_RECV_MESSAGE)) { |
| empty = |
| (NULL == (*call->request_data[GRPC_IOREQ_RECV_MESSAGE].recv_message = |
| grpc_bbq_pop(&call->incoming_queue))); |
| if (!empty) { |
| finish_live_ioreq_op(call, GRPC_IOREQ_RECV_MESSAGE, GRPC_OP_OK); |
| empty = grpc_bbq_empty(&call->incoming_queue); |
| } |
| } else { |
| empty = grpc_bbq_empty(&call->incoming_queue); |
| } |
| |
| switch (call->read_state) { |
| case READ_STATE_STREAM_CLOSED: |
| if (empty) { |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_CLOSE, GRPC_OP_OK); |
| } |
| /* fallthrough */ |
| case READ_STATE_READ_CLOSED: |
| if (empty) { |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_MESSAGE, GRPC_OP_OK); |
| } |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_STATUS, GRPC_OP_OK); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_STATUS_DETAILS, GRPC_OP_OK); |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_TRAILING_METADATA, GRPC_OP_OK); |
| /* fallthrough */ |
| case READ_STATE_GOT_INITIAL_METADATA: |
| finish_ioreq_op(call, GRPC_IOREQ_RECV_INITIAL_METADATA, GRPC_OP_OK); |
| /* fallthrough */ |
| case READ_STATE_INITIAL: |
| /* do nothing */ |
| break; |
| } |
| } |
| |
| static void early_out_write_ops(grpc_call *call) { |
| switch (call->write_state) { |
| case WRITE_STATE_WRITE_CLOSED: |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_MESSAGE, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_STATUS, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_TRAILING_METADATA, GRPC_OP_ERROR); |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_CLOSE, GRPC_OP_OK); |
| /* fallthrough */ |
| case WRITE_STATE_STARTED: |
| finish_ioreq_op(call, GRPC_IOREQ_SEND_INITIAL_METADATA, GRPC_OP_ERROR); |
| /* fallthrough */ |
| case WRITE_STATE_INITIAL: |
| /* do nothing */ |
| break; |
| } |
| } |
| |
| static grpc_call_error start_ioreq(grpc_call *call, const grpc_ioreq *reqs, |
| size_t nreqs, |
| grpc_ioreq_completion_func completion, |
| void *user_data) { |
| size_t i; |
| gpr_uint32 have_ops = 0; |
| grpc_ioreq_op op; |
| reqinfo_master *master; |
| grpc_ioreq_data data; |
| gpr_uint8 set; |
| |
| if (nreqs == 0) { |
| return GRPC_CALL_OK; |
| } |
| |
| set = reqs[0].op; |
| |
| for (i = 0; i < nreqs; i++) { |
| op = reqs[i].op; |
| if (call->request_set[op] < GRPC_IOREQ_OP_COUNT) { |
| return start_ioreq_error(call, have_ops, |
| GRPC_CALL_ERROR_TOO_MANY_OPERATIONS); |
| } else if (call->request_set[op] == REQSET_DONE) { |
| return start_ioreq_error(call, have_ops, GRPC_CALL_ERROR_ALREADY_INVOKED); |
| } |
| have_ops |= 1u << op; |
| data = reqs[i].data; |
| |
| call->request_data[op] = data; |
| call->request_set[op] = set; |
| } |
| |
| master = &call->masters[set]; |
| master->status = GRPC_OP_OK; |
| master->need_mask = have_ops; |
| master->complete_mask = 0; |
| master->on_complete = completion; |
| master->user_data = user_data; |
| |
| finish_read_ops(call); |
| early_out_write_ops(call); |
| |
| return GRPC_CALL_OK; |
| } |
| |
| grpc_call_error grpc_call_start_ioreq_and_call_back( |
| grpc_call *call, const grpc_ioreq *reqs, size_t nreqs, |
| grpc_ioreq_completion_func on_complete, void *user_data) { |
| grpc_call_error err; |
| lock(call); |
| err = start_ioreq(call, reqs, nreqs, on_complete, user_data); |
| unlock(call); |
| return err; |
| } |
| |
| void grpc_call_destroy(grpc_call *c) { |
| int cancel; |
| lock(c); |
| if (c->have_alarm) { |
| grpc_alarm_cancel(&c->alarm); |
| c->have_alarm = 0; |
| } |
| cancel = c->read_state != READ_STATE_STREAM_CLOSED; |
| unlock(c); |
| if (cancel) grpc_call_cancel(c); |
| GRPC_CALL_INTERNAL_UNREF(c, "destroy", 1); |
| } |
| |
| grpc_call_error grpc_call_cancel(grpc_call *call) { |
| return grpc_call_cancel_with_status(call, GRPC_STATUS_CANCELLED, "Cancelled"); |
| } |
| |
| grpc_call_error grpc_call_cancel_with_status(grpc_call *c, |
| grpc_status_code status, |
| const char *description) { |
| return grpc_call_cancel_with_status_internal(c, status, description, 0); |
| } |
| |
| static grpc_call_error grpc_call_cancel_with_status_internal( |
| grpc_call *c, grpc_status_code status, const char *description, |
| gpr_uint8 locked) { |
| grpc_transport_op op; |
| grpc_mdstr *details = |
| description ? grpc_mdstr_from_string(c->metadata_context, description) |
| : NULL; |
| memset(&op, 0, sizeof(op)); |
| op.cancel_with_status = status; |
| |
| if (locked == 0) { |
| lock(c); |
| } |
| set_status_code(c, STATUS_FROM_API_OVERRIDE, status); |
| set_status_details(c, STATUS_FROM_API_OVERRIDE, details); |
| if (locked == 0) { |
| unlock(c); |
| } |
| |
| execute_op(c, &op); |
| |
| return GRPC_CALL_OK; |
| } |
| |
| static void execute_op(grpc_call *call, grpc_transport_op *op) { |
| grpc_call_element *elem; |
| elem = CALL_ELEM_FROM_CALL(call, 0); |
| elem->filter->start_transport_op(elem, op); |
| } |
| |
| grpc_call *grpc_call_from_top_element(grpc_call_element *elem) { |
| return CALL_FROM_TOP_ELEM(elem); |
| } |
| |
| static void call_alarm(void *arg, int success) { |
| grpc_call *call = arg; |
| if (success) { |
| if (call->is_client) { |
| grpc_call_cancel_with_status_internal(call, GRPC_STATUS_DEADLINE_EXCEEDED, |
| "Deadline Exceeded", 0); |
| } else { |
| grpc_call_cancel(call); |
| } |
| } |
| GRPC_CALL_INTERNAL_UNREF(call, "alarm", 1); |
| } |
| |
| static void set_deadline_alarm(grpc_call *call, gpr_timespec deadline) { |
| if (call->have_alarm) { |
| gpr_log(GPR_ERROR, "Attempt to set deadline alarm twice"); |
| assert(0); |
| return; |
| } |
| GRPC_CALL_INTERNAL_REF(call, "alarm"); |
| call->have_alarm = 1; |
| grpc_alarm_init(&call->alarm, deadline, call_alarm, call, gpr_now()); |
| } |
| |
| /* we offset status by a small amount when storing it into transport metadata |
| as metadata cannot store a 0 value (which is used as OK for grpc_status_codes |
| */ |
| #define STATUS_OFFSET 1 |
| static void destroy_status(void *ignored) {} |
| |
| static gpr_uint32 decode_status(grpc_mdelem *md) { |
| gpr_uint32 status; |
| void *user_data = grpc_mdelem_get_user_data(md, destroy_status); |
| if (user_data) { |
| status = ((gpr_uint32)(gpr_intptr)user_data) - STATUS_OFFSET; |
| } else { |
| if (!gpr_parse_bytes_to_uint32(grpc_mdstr_as_c_string(md->value), |
| GPR_SLICE_LENGTH(md->value->slice), |
| &status)) { |
| status = GRPC_STATUS_UNKNOWN; /* could not parse status code */ |
| } |
| grpc_mdelem_set_user_data(md, destroy_status, |
| (void *)(gpr_intptr)(status + STATUS_OFFSET)); |
| } |
| return status; |
| } |
| |
| static void recv_metadata(grpc_call *call, grpc_metadata_batch *md) { |
| grpc_linked_mdelem *l; |
| grpc_metadata_array *dest; |
| grpc_metadata *mdusr; |
| int is_trailing; |
| grpc_mdctx *mdctx = call->metadata_context; |
| |
| is_trailing = call->read_state >= READ_STATE_GOT_INITIAL_METADATA; |
| for (l = md->list.head; l != NULL; l = l->next) { |
| grpc_mdelem *md = l->md; |
| grpc_mdstr *key = md->key; |
| if (key == grpc_channel_get_status_string(call->channel)) { |
| set_status_code(call, STATUS_FROM_WIRE, decode_status(md)); |
| } else if (key == grpc_channel_get_message_string(call->channel)) { |
| set_status_details(call, STATUS_FROM_WIRE, grpc_mdstr_ref(md->value)); |
| } else { |
| dest = &call->buffered_metadata[is_trailing]; |
| if (dest->count == dest->capacity) { |
| dest->capacity = GPR_MAX(dest->capacity + 8, dest->capacity * 2); |
| dest->metadata = |
| gpr_realloc(dest->metadata, sizeof(grpc_metadata) * dest->capacity); |
| } |
| mdusr = &dest->metadata[dest->count++]; |
| mdusr->key = grpc_mdstr_as_c_string(md->key); |
| mdusr->value = grpc_mdstr_as_c_string(md->value); |
| mdusr->value_length = GPR_SLICE_LENGTH(md->value->slice); |
| if (call->owned_metadata_count == call->owned_metadata_capacity) { |
| call->owned_metadata_capacity = |
| GPR_MAX(call->owned_metadata_capacity + 8, |
| call->owned_metadata_capacity * 2); |
| call->owned_metadata = |
| gpr_realloc(call->owned_metadata, |
| sizeof(grpc_mdelem *) * call->owned_metadata_capacity); |
| } |
| call->owned_metadata[call->owned_metadata_count++] = md; |
| l->md = 0; |
| } |
| } |
| if (gpr_time_cmp(md->deadline, gpr_inf_future) != 0) { |
| set_deadline_alarm(call, md->deadline); |
| } |
| if (!is_trailing) { |
| call->read_state = READ_STATE_GOT_INITIAL_METADATA; |
| } |
| |
| grpc_mdctx_lock(mdctx); |
| for (l = md->list.head; l; l = l->next) { |
| if (l->md) grpc_mdctx_locked_mdelem_unref(mdctx, l->md); |
| } |
| for (l = md->garbage.head; l; l = l->next) { |
| grpc_mdctx_locked_mdelem_unref(mdctx, l->md); |
| } |
| grpc_mdctx_unlock(mdctx); |
| } |
| |
| grpc_call_stack *grpc_call_get_call_stack(grpc_call *call) { |
| return CALL_STACK_FROM_CALL(call); |
| } |
| |
| /* |
| * BATCH API IMPLEMENTATION |
| */ |
| |
| static void set_status_value_directly(grpc_status_code status, void *dest) { |
| *(grpc_status_code *)dest = status; |
| } |
| |
| static void set_cancelled_value(grpc_status_code status, void *dest) { |
| *(grpc_status_code *)dest = (status != GRPC_STATUS_OK); |
| } |
| |
| static void finish_batch(grpc_call *call, grpc_op_error result, void *tag) { |
| grpc_cq_end_op(call->cq, tag, call, do_nothing, NULL, GRPC_OP_OK); |
| } |
| |
| grpc_call_error grpc_call_start_batch(grpc_call *call, const grpc_op *ops, |
| size_t nops, void *tag) { |
| grpc_ioreq reqs[GRPC_IOREQ_OP_COUNT]; |
| size_t in; |
| size_t out; |
| const grpc_op *op; |
| grpc_ioreq *req; |
| |
| GRPC_CALL_LOG_BATCH(GPR_INFO, call, ops, nops, tag); |
| |
| if (nops == 0) { |
| grpc_cq_begin_op(call->cq, call, GRPC_OP_COMPLETE); |
| grpc_cq_end_op(call->cq, tag, call, do_nothing, NULL, GRPC_OP_OK); |
| return GRPC_CALL_OK; |
| } |
| |
| /* rewrite batch ops into ioreq ops */ |
| for (in = 0, out = 0; in < nops; in++) { |
| op = &ops[in]; |
| switch (op->op) { |
| case GRPC_OP_SEND_INITIAL_METADATA: |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_INITIAL_METADATA; |
| req->data.send_metadata.count = op->data.send_initial_metadata.count; |
| req->data.send_metadata.metadata = |
| op->data.send_initial_metadata.metadata; |
| break; |
| case GRPC_OP_SEND_MESSAGE: |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_MESSAGE; |
| req->data.send_message = op->data.send_message; |
| break; |
| case GRPC_OP_SEND_CLOSE_FROM_CLIENT: |
| if (!call->is_client) { |
| return GRPC_CALL_ERROR_NOT_ON_SERVER; |
| } |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_CLOSE; |
| break; |
| case GRPC_OP_SEND_STATUS_FROM_SERVER: |
| if (call->is_client) { |
| return GRPC_CALL_ERROR_NOT_ON_CLIENT; |
| } |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_TRAILING_METADATA; |
| req->data.send_metadata.count = |
| op->data.send_status_from_server.trailing_metadata_count; |
| req->data.send_metadata.metadata = |
| op->data.send_status_from_server.trailing_metadata; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_STATUS; |
| req->data.send_status.code = op->data.send_status_from_server.status; |
| req->data.send_status.details = |
| op->data.send_status_from_server.status_details; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_SEND_CLOSE; |
| break; |
| case GRPC_OP_RECV_INITIAL_METADATA: |
| if (!call->is_client) { |
| return GRPC_CALL_ERROR_NOT_ON_SERVER; |
| } |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_INITIAL_METADATA; |
| req->data.recv_metadata = op->data.recv_initial_metadata; |
| break; |
| case GRPC_OP_RECV_MESSAGE: |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_MESSAGE; |
| req->data.recv_message = op->data.recv_message; |
| break; |
| case GRPC_OP_RECV_STATUS_ON_CLIENT: |
| if (!call->is_client) { |
| return GRPC_CALL_ERROR_NOT_ON_SERVER; |
| } |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_STATUS; |
| req->data.recv_status.set_value = set_status_value_directly; |
| req->data.recv_status.user_data = op->data.recv_status_on_client.status; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_STATUS_DETAILS; |
| req->data.recv_status_details.details = |
| op->data.recv_status_on_client.status_details; |
| req->data.recv_status_details.details_capacity = |
| op->data.recv_status_on_client.status_details_capacity; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_TRAILING_METADATA; |
| req->data.recv_metadata = |
| op->data.recv_status_on_client.trailing_metadata; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_CLOSE; |
| break; |
| case GRPC_OP_RECV_CLOSE_ON_SERVER: |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_STATUS; |
| req->data.recv_status.set_value = set_cancelled_value; |
| req->data.recv_status.user_data = |
| op->data.recv_close_on_server.cancelled; |
| req = &reqs[out++]; |
| req->op = GRPC_IOREQ_RECV_CLOSE; |
| break; |
| } |
| } |
| |
| grpc_cq_begin_op(call->cq, call, GRPC_OP_COMPLETE); |
| |
| return grpc_call_start_ioreq_and_call_back(call, reqs, out, finish_batch, |
| tag); |
| } |