Create inproc transport, add relevant tests, exclude irrelevant tests
diff --git a/src/core/ext/transport/inproc/inproc_transport.c b/src/core/ext/transport/inproc/inproc_transport.c
new file mode 100644
index 0000000..2602b7d
--- /dev/null
+++ b/src/core/ext/transport/inproc/inproc_transport.c
@@ -0,0 +1,1265 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include "src/core/ext/transport/inproc/inproc_transport.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include <string.h>
+#include "src/core/lib/channel/channel_args.h"
+#include "src/core/lib/slice/slice_internal.h"
+#include "src/core/lib/surface/api_trace.h"
+#include "src/core/lib/surface/channel.h"
+#include "src/core/lib/surface/channel_stack_type.h"
+#include "src/core/lib/surface/server.h"
+#include "src/core/lib/transport/connectivity_state.h"
+#include "src/core/lib/transport/error_utils.h"
+#include "src/core/lib/transport/transport_impl.h"
+
+#define INPROC_LOG(...) \
+ do { \
+ if (GRPC_TRACER_ON(grpc_inproc_trace)) gpr_log(__VA_ARGS__); \
+ } while (0)
+
+static const grpc_transport_vtable inproc_vtable;
+static grpc_slice g_empty_slice;
+static grpc_slice g_fake_path_key;
+static grpc_slice g_fake_path_value;
+static grpc_slice g_fake_auth_key;
+static grpc_slice g_fake_auth_value;
+
+typedef struct {
+ gpr_mu mu;
+ gpr_refcount refs;
+} shared_mu;
+
+typedef struct inproc_transport {
+ grpc_transport base;
+ shared_mu *mu;
+ gpr_refcount refs;
+ bool is_client;
+ grpc_connectivity_state_tracker connectivity;
+ void (*accept_stream_cb)(grpc_exec_ctx *exec_ctx, void *user_data,
+ grpc_transport *transport, const void *server_data);
+ void *accept_stream_data;
+ bool is_closed;
+ struct inproc_transport *other_side;
+ struct inproc_stream *stream_list;
+} inproc_transport;
+
+typedef struct sb_list_entry {
+ grpc_slice_buffer sb;
+ struct sb_list_entry *next;
+} sb_list_entry;
+
+// Specialize grpc_byte_stream for our use case
+typedef struct {
+ grpc_byte_stream base;
+ sb_list_entry *le;
+} inproc_slice_byte_stream;
+
+typedef struct {
+ // TODO (vjpai): Add some inlined elements to avoid alloc in simple cases
+ sb_list_entry *head;
+ sb_list_entry *tail;
+} slice_buffer_list;
+
+static void slice_buffer_list_init(slice_buffer_list *l) {
+ l->head = NULL;
+ l->tail = NULL;
+}
+
+static void sb_list_entry_destroy(grpc_exec_ctx *exec_ctx, sb_list_entry *le) {
+ grpc_slice_buffer_destroy_internal(exec_ctx, &le->sb);
+ gpr_free(le);
+}
+
+static void slice_buffer_list_destroy(grpc_exec_ctx *exec_ctx,
+ slice_buffer_list *l) {
+ sb_list_entry *curr = l->head;
+ while (curr != NULL) {
+ sb_list_entry *le = curr;
+ curr = curr->next;
+ sb_list_entry_destroy(exec_ctx, le);
+ }
+ l->head = NULL;
+ l->tail = NULL;
+}
+
+static bool slice_buffer_list_empty(slice_buffer_list *l) {
+ return l->head == NULL;
+}
+
+static void slice_buffer_list_append_entry(slice_buffer_list *l,
+ sb_list_entry *next) {
+ next->next = NULL;
+ if (l->tail) {
+ l->tail->next = next;
+ l->tail = next;
+ } else {
+ l->head = next;
+ l->tail = next;
+ }
+}
+
+static grpc_slice_buffer *slice_buffer_list_append(slice_buffer_list *l) {
+ sb_list_entry *next = gpr_malloc(sizeof(*next));
+ grpc_slice_buffer_init(&next->sb);
+ slice_buffer_list_append_entry(l, next);
+ return &next->sb;
+}
+
+static sb_list_entry *slice_buffer_list_pophead(slice_buffer_list *l) {
+ sb_list_entry *ret = l->head;
+ l->head = l->head->next;
+ if (l->head == NULL) {
+ l->tail = NULL;
+ }
+ return ret;
+}
+
+typedef struct inproc_stream {
+ inproc_transport *t;
+ grpc_metadata_batch to_read_initial_md;
+ uint32_t to_read_initial_md_flags;
+ bool to_read_initial_md_filled;
+ slice_buffer_list to_read_message;
+ grpc_metadata_batch to_read_trailing_md;
+ bool to_read_trailing_md_filled;
+ bool reads_needed;
+ bool read_closure_scheduled;
+ grpc_closure read_closure;
+ // Write buffer used only during gap at init time when client-side
+ // stream is set up but server side stream is not yet set up
+ grpc_metadata_batch write_buffer_initial_md;
+ bool write_buffer_initial_md_filled;
+ uint32_t write_buffer_initial_md_flags;
+ gpr_timespec write_buffer_deadline;
+ slice_buffer_list write_buffer_message;
+ grpc_metadata_batch write_buffer_trailing_md;
+ bool write_buffer_trailing_md_filled;
+ grpc_error *write_buffer_cancel_error;
+
+ struct inproc_stream *other_side;
+ bool other_side_closed; // won't talk anymore
+ bool write_buffer_other_side_closed; // on hold
+ grpc_stream_refcount *refs;
+ grpc_closure *closure_at_destroy;
+
+ gpr_arena *arena;
+
+ grpc_transport_stream_op_batch *recv_initial_md_op;
+ grpc_transport_stream_op_batch *recv_message_op;
+ grpc_transport_stream_op_batch *recv_trailing_md_op;
+
+ inproc_slice_byte_stream recv_message_stream;
+
+ bool initial_md_sent;
+ bool trailing_md_sent;
+ bool initial_md_recvd;
+ bool trailing_md_recvd;
+
+ bool closed;
+
+ grpc_error *cancel_self_error;
+ grpc_error *cancel_other_error;
+
+ gpr_timespec deadline;
+
+ bool listed;
+ struct inproc_stream *stream_list_prev;
+ struct inproc_stream *stream_list_next;
+} inproc_stream;
+
+static bool inproc_slice_byte_stream_next(grpc_exec_ctx *exec_ctx,
+ grpc_byte_stream *bs, size_t max,
+ grpc_closure *on_complete) {
+ inproc_slice_byte_stream *stream = (inproc_slice_byte_stream *)bs;
+ return (stream->le->sb.count != 0);
+}
+
+static grpc_error *inproc_slice_byte_stream_pull(grpc_exec_ctx *exec_ctx,
+ grpc_byte_stream *bs,
+ grpc_slice *slice) {
+ inproc_slice_byte_stream *stream = (inproc_slice_byte_stream *)bs;
+ *slice = grpc_slice_buffer_take_first(&stream->le->sb);
+ return GRPC_ERROR_NONE;
+}
+
+static void inproc_slice_byte_stream_destroy(grpc_exec_ctx *exec_ctx,
+ grpc_byte_stream *bs) {
+ inproc_slice_byte_stream *stream = (inproc_slice_byte_stream *)bs;
+ sb_list_entry_destroy(exec_ctx, stream->le);
+}
+
+void inproc_slice_byte_stream_init(inproc_slice_byte_stream *s,
+ sb_list_entry *le) {
+ s->base.length = (uint32_t)le->sb.length;
+ s->base.flags = 0;
+ s->base.next = inproc_slice_byte_stream_next;
+ s->base.pull = inproc_slice_byte_stream_pull;
+ s->base.destroy = inproc_slice_byte_stream_destroy;
+ s->le = le;
+}
+
+static void ref_transport(inproc_transport *t) {
+ INPROC_LOG(GPR_DEBUG, "ref_transport %p", t);
+ gpr_ref(&t->refs);
+}
+
+static void really_destroy_transport(grpc_exec_ctx *exec_ctx,
+ inproc_transport *t) {
+ INPROC_LOG(GPR_DEBUG, "really_destroy_transport %p", t);
+ grpc_connectivity_state_destroy(exec_ctx, &t->connectivity);
+ if (gpr_unref(&t->mu->refs)) {
+ gpr_free(t->mu);
+ }
+ gpr_free(t);
+}
+
+static void unref_transport(grpc_exec_ctx *exec_ctx, inproc_transport *t) {
+ INPROC_LOG(GPR_DEBUG, "unref_transport %p", t);
+ if (gpr_unref(&t->refs)) {
+ really_destroy_transport(exec_ctx, t);
+ }
+}
+
+#ifndef NDEBUG
+#define STREAM_REF(refs, reason) grpc_stream_ref(refs, reason)
+#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs, reason)
+#else
+#define STREAM_REF(refs, reason) grpc_stream_ref(refs)
+#define STREAM_UNREF(e, refs, reason) grpc_stream_unref(e, refs)
+#endif
+
+static void ref_stream(inproc_stream *s, const char *reason) {
+ INPROC_LOG(GPR_DEBUG, "ref_stream %p %s", s, reason);
+ STREAM_REF(s->refs, reason);
+}
+
+static void unref_stream(grpc_exec_ctx *exec_ctx, inproc_stream *s,
+ const char *reason) {
+ INPROC_LOG(GPR_DEBUG, "unref_stream %p %s", s, reason);
+ STREAM_UNREF(exec_ctx, s->refs, reason);
+}
+
+static void really_destroy_stream(grpc_exec_ctx *exec_ctx, inproc_stream *s) {
+ INPROC_LOG(GPR_DEBUG, "really_destroy_stream %p", s);
+
+ grpc_metadata_batch_destroy(exec_ctx, &s->to_read_initial_md);
+ slice_buffer_list_destroy(exec_ctx, &s->to_read_message);
+ grpc_metadata_batch_destroy(exec_ctx, &s->to_read_trailing_md);
+ grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_initial_md);
+ slice_buffer_list_destroy(exec_ctx, &s->write_buffer_message);
+ grpc_metadata_batch_destroy(exec_ctx, &s->write_buffer_trailing_md);
+ GRPC_ERROR_UNREF(s->write_buffer_cancel_error);
+ GRPC_ERROR_UNREF(s->cancel_self_error);
+ GRPC_ERROR_UNREF(s->cancel_other_error);
+
+ unref_transport(exec_ctx, s->t);
+
+ if (s->closure_at_destroy) {
+ GRPC_CLOSURE_SCHED(exec_ctx, s->closure_at_destroy, GRPC_ERROR_NONE);
+ }
+}
+
+static void read_state_machine(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_error *error);
+
+static void log_metadata(const grpc_metadata_batch *md_batch, bool is_client,
+ bool is_initial) {
+ for (grpc_linked_mdelem *md = md_batch->list.head; md != NULL;
+ md = md->next) {
+ char *key = grpc_slice_to_c_string(GRPC_MDKEY(md->md));
+ char *value = grpc_slice_to_c_string(GRPC_MDVALUE(md->md));
+ gpr_log(GPR_INFO, "INPROC:%s:%s: %s: %s", is_initial ? "HDR" : "TRL",
+ is_client ? "CLI" : "SVR", key, value);
+ gpr_free(key);
+ gpr_free(value);
+ }
+}
+
+static grpc_error *fill_in_metadata(grpc_exec_ctx *exec_ctx, inproc_stream *s,
+ const grpc_metadata_batch *metadata,
+ uint32_t flags, grpc_metadata_batch *out_md,
+ uint32_t *outflags, bool *markfilled) {
+ if (outflags != NULL) {
+ *outflags = flags;
+ }
+ if (markfilled != NULL) {
+ *markfilled = true;
+ }
+ grpc_error *error = GRPC_ERROR_NONE;
+ for (grpc_linked_mdelem *elem = metadata->list.head;
+ (elem != NULL) && (error == GRPC_ERROR_NONE); elem = elem->next) {
+ grpc_linked_mdelem *nelem = gpr_arena_alloc(s->arena, sizeof(*nelem));
+ nelem->md = grpc_mdelem_from_slices(
+ exec_ctx, grpc_slice_intern(GRPC_MDKEY(elem->md)),
+ grpc_slice_intern(GRPC_MDVALUE(elem->md)));
+
+ error = grpc_metadata_batch_link_tail(exec_ctx, out_md, nelem);
+ }
+ return error;
+}
+
+static int init_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_stream *gs, grpc_stream_refcount *refcount,
+ const void *server_data, gpr_arena *arena) {
+ INPROC_LOG(GPR_DEBUG, "init_stream %p %p %p", gt, gs, server_data);
+ inproc_transport *t = (inproc_transport *)gt;
+ inproc_stream *s = (inproc_stream *)gs;
+ s->arena = arena;
+
+ s->refs = refcount;
+ // Ref this stream right now
+ ref_stream(s, "inproc_init_stream:init");
+
+ grpc_metadata_batch_init(&s->to_read_initial_md);
+ s->to_read_initial_md_flags = 0;
+ s->to_read_initial_md_filled = false;
+ grpc_metadata_batch_init(&s->to_read_trailing_md);
+ s->to_read_trailing_md_filled = false;
+ grpc_metadata_batch_init(&s->write_buffer_initial_md);
+ s->write_buffer_initial_md_flags = 0;
+ s->write_buffer_initial_md_filled = false;
+ grpc_metadata_batch_init(&s->write_buffer_trailing_md);
+ s->write_buffer_trailing_md_filled = false;
+ slice_buffer_list_init(&s->to_read_message);
+ slice_buffer_list_init(&s->write_buffer_message);
+ s->reads_needed = false;
+ s->read_closure_scheduled = false;
+ GRPC_CLOSURE_INIT(&s->read_closure, read_state_machine, s,
+ grpc_schedule_on_exec_ctx);
+ s->t = t;
+ s->closure_at_destroy = NULL;
+ s->other_side_closed = false;
+
+ s->initial_md_sent = s->trailing_md_sent = s->initial_md_recvd =
+ s->trailing_md_recvd = false;
+
+ s->closed = false;
+
+ s->cancel_self_error = GRPC_ERROR_NONE;
+ s->cancel_other_error = GRPC_ERROR_NONE;
+ s->write_buffer_cancel_error = GRPC_ERROR_NONE;
+ s->deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
+ s->write_buffer_deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
+
+ s->stream_list_prev = NULL;
+ gpr_mu_lock(&t->mu->mu);
+ s->listed = true;
+ ref_stream(s, "inproc_init_stream:list");
+ s->stream_list_next = t->stream_list;
+ if (t->stream_list) {
+ t->stream_list->stream_list_prev = s;
+ }
+ t->stream_list = s;
+ gpr_mu_unlock(&t->mu->mu);
+
+ if (!server_data) {
+ ref_transport(t);
+ inproc_transport *st = t->other_side;
+ ref_transport(st);
+ s->other_side = NULL; // will get filled in soon
+ // Pass the client-side stream address to the server-side for a ref
+ ref_stream(s, "inproc_init_stream:clt"); // ref it now on behalf of server
+ // side to avoid destruction
+ INPROC_LOG(GPR_DEBUG, "calling accept stream cb %p %p",
+ st->accept_stream_cb, st->accept_stream_data);
+ (*st->accept_stream_cb)(exec_ctx, st->accept_stream_data, &st->base,
+ (void *)s);
+ } else {
+ // This is the server-side and is being called through accept_stream_cb
+ inproc_stream *cs = (inproc_stream *)server_data;
+ s->other_side = cs;
+ // Ref the server-side stream on behalf of the client now
+ ref_stream(s, "inproc_init_stream:srv");
+
+ // Now we are about to affect the other side, so lock the transport
+ // to make sure that it doesn't get destroyed
+ gpr_mu_lock(&s->t->mu->mu);
+ cs->other_side = s;
+ // Now transfer from the other side's write_buffer if any to the to_read
+ // buffer
+ if (cs->write_buffer_initial_md_filled) {
+ fill_in_metadata(exec_ctx, s, &cs->write_buffer_initial_md,
+ cs->write_buffer_initial_md_flags,
+ &s->to_read_initial_md, &s->to_read_initial_md_flags,
+ &s->to_read_initial_md_filled);
+ s->deadline = gpr_time_min(s->deadline, cs->write_buffer_deadline);
+ grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_initial_md);
+ cs->write_buffer_initial_md_filled = false;
+ }
+ while (!slice_buffer_list_empty(&cs->write_buffer_message)) {
+ slice_buffer_list_append_entry(
+ &s->to_read_message,
+ slice_buffer_list_pophead(&cs->write_buffer_message));
+ }
+ if (cs->write_buffer_trailing_md_filled) {
+ fill_in_metadata(exec_ctx, s, &cs->write_buffer_trailing_md, 0,
+ &s->to_read_trailing_md, NULL,
+ &s->to_read_trailing_md_filled);
+ grpc_metadata_batch_clear(exec_ctx, &cs->write_buffer_trailing_md);
+ cs->write_buffer_trailing_md_filled = false;
+ }
+ if (cs->write_buffer_cancel_error != GRPC_ERROR_NONE) {
+ s->cancel_other_error = cs->write_buffer_cancel_error;
+ cs->write_buffer_cancel_error = GRPC_ERROR_NONE;
+ }
+
+ gpr_mu_unlock(&s->t->mu->mu);
+ }
+ return 0; // return value is not important
+}
+
+static void close_stream_locked(grpc_exec_ctx *exec_ctx, inproc_stream *s) {
+ if (!s->closed) {
+ if (s->listed) {
+ inproc_stream *p = s->stream_list_prev;
+ inproc_stream *n = s->stream_list_next;
+ if (p != NULL) {
+ p->stream_list_next = n;
+ } else {
+ s->t->stream_list = n;
+ }
+ if (n != NULL) {
+ n->stream_list_prev = p;
+ }
+ s->listed = false;
+ unref_stream(exec_ctx, s, "close_stream:list");
+ }
+ s->closed = true;
+ unref_stream(exec_ctx, s, "close_stream:closing");
+ }
+}
+
+// This function means that we are done talking/listening to the other side
+static void close_other_side_locked(grpc_exec_ctx *exec_ctx, inproc_stream *s,
+ const char *reason) {
+ if (s->other_side != NULL) {
+ unref_stream(exec_ctx, s->other_side, reason);
+ s->other_side_closed = true;
+ s->other_side = NULL;
+ } else if (!s->other_side_closed) {
+ s->write_buffer_other_side_closed = true;
+ }
+}
+
+static void fail_helper_locked(grpc_exec_ctx *exec_ctx, inproc_stream *s,
+ grpc_error *error) {
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p fail_helper", s);
+ // If we're failing this side, we need to make sure that
+ // we also send or have already sent trailing metadata
+ if (!s->trailing_md_sent) {
+ // Send trailing md to the other side indicating cancellation
+ s->trailing_md_sent = true;
+
+ grpc_metadata_batch fake_md;
+ grpc_metadata_batch_init(&fake_md);
+
+ inproc_stream *other = s->other_side;
+ grpc_metadata_batch *dest = (other == NULL) ? &s->write_buffer_trailing_md
+ : &other->to_read_trailing_md;
+ bool *destfilled = (other == NULL) ? &s->write_buffer_trailing_md_filled
+ : &other->to_read_trailing_md_filled;
+ fill_in_metadata(exec_ctx, s, &fake_md, 0, dest, NULL, destfilled);
+ grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+
+ if (other != NULL) {
+ if (other->cancel_other_error == GRPC_ERROR_NONE) {
+ other->cancel_other_error = GRPC_ERROR_REF(error);
+ }
+ if (other->reads_needed) {
+ if (!other->read_closure_scheduled) {
+ GRPC_CLOSURE_SCHED(exec_ctx, &other->read_closure,
+ GRPC_ERROR_REF(error));
+ other->read_closure_scheduled = true;
+ }
+ other->reads_needed = false;
+ }
+ } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
+ s->write_buffer_cancel_error = GRPC_ERROR_REF(error);
+ }
+ }
+ if (s->recv_initial_md_op) {
+ grpc_error *err;
+ if (!s->t->is_client) {
+ // If this is a server, provide initial metadata with a path and authority
+ // since it expects that as well as no error yet
+ grpc_metadata_batch fake_md;
+ grpc_metadata_batch_init(&fake_md);
+ grpc_linked_mdelem *path_md = gpr_arena_alloc(s->arena, sizeof(*path_md));
+ path_md->md =
+ grpc_mdelem_from_slices(exec_ctx, g_fake_path_key, g_fake_path_value);
+ GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, path_md) ==
+ GRPC_ERROR_NONE);
+ grpc_linked_mdelem *auth_md = gpr_arena_alloc(s->arena, sizeof(*auth_md));
+ auth_md->md =
+ grpc_mdelem_from_slices(exec_ctx, g_fake_auth_key, g_fake_auth_value);
+ GPR_ASSERT(grpc_metadata_batch_link_tail(exec_ctx, &fake_md, auth_md) ==
+ GRPC_ERROR_NONE);
+
+ fill_in_metadata(
+ exec_ctx, s, &fake_md, 0,
+ s->recv_initial_md_op->payload->recv_initial_metadata
+ .recv_initial_metadata,
+ s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags,
+ NULL);
+ grpc_metadata_batch_destroy(exec_ctx, &fake_md);
+ err = GRPC_ERROR_NONE;
+ } else {
+ err = GRPC_ERROR_REF(error);
+ }
+ INPROC_LOG(GPR_DEBUG,
+ "fail_helper %p scheduling initial-metadata-ready %p %p", s,
+ error, err);
+ GRPC_CLOSURE_SCHED(exec_ctx,
+ s->recv_initial_md_op->payload->recv_initial_metadata
+ .recv_initial_metadata_ready,
+ err);
+ // Last use of err so no need to REF and then UNREF it
+
+ if ((s->recv_initial_md_op != s->recv_message_op) &&
+ (s->recv_initial_md_op != s->recv_trailing_md_op)) {
+ INPROC_LOG(GPR_DEBUG,
+ "fail_helper %p scheduling initial-metadata-on-complete %p",
+ error, s);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_initial_md_op->on_complete,
+ GRPC_ERROR_REF(error));
+ }
+ s->recv_initial_md_op = NULL;
+ }
+ if (s->recv_message_op) {
+ INPROC_LOG(GPR_DEBUG, "fail_helper %p scheduling message-ready %p", s,
+ error);
+ GRPC_CLOSURE_SCHED(
+ exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+ GRPC_ERROR_REF(error));
+ if (s->recv_message_op != s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG, "fail_helper %p scheduling message-on-complete %p",
+ s, error);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_message_op->on_complete,
+ GRPC_ERROR_REF(error));
+ }
+ s->recv_message_op = NULL;
+ }
+ if (s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "fail_helper %p scheduling trailing-md-on-complete %p", s,
+ error);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+ GRPC_ERROR_REF(error));
+ s->recv_trailing_md_op = NULL;
+ }
+ close_other_side_locked(exec_ctx, s, "fail_helper:other_side");
+ close_stream_locked(exec_ctx, s);
+
+ GRPC_ERROR_UNREF(error);
+}
+
+static void read_state_machine(grpc_exec_ctx *exec_ctx, void *arg,
+ grpc_error *error) {
+ // This function gets called when we have contents in the unprocessed reads
+ // Get what we want based on our ops wanted
+ // Schedule our appropriate closures
+ // and then return to reads_needed state if still needed
+
+ // Since this is a closure directly invoked by the combiner, it should not
+ // unref the error parameter explicitly; the combiner will do that implicitly
+ grpc_error *new_err = GRPC_ERROR_NONE;
+
+ bool needs_close = false;
+
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p", arg);
+ inproc_stream *s = (inproc_stream *)arg;
+ gpr_mu *mu = &s->t->mu->mu; // keep aside in case s gets closed
+ gpr_mu_lock(mu);
+ s->read_closure_scheduled = false;
+ // cancellation takes precedence
+ if (s->cancel_self_error != GRPC_ERROR_NONE) {
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_self_error));
+ goto done;
+ } else if (s->cancel_other_error != GRPC_ERROR_NONE) {
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(s->cancel_other_error));
+ goto done;
+ } else if (error != GRPC_ERROR_NONE) {
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(error));
+ goto done;
+ }
+
+ if (s->recv_initial_md_op) {
+ if (!s->to_read_initial_md_filled) {
+ // We entered the state machine on some other kind of read even though
+ // we still haven't satisfied initial md . That's an error.
+ new_err =
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unexpected frame sequencing");
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling on_complete errors for no "
+ "initial md %p",
+ s, new_err);
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+ goto done;
+ } else if (s->initial_md_recvd) {
+ new_err =
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already recvd initial md");
+ INPROC_LOG(
+ GPR_DEBUG,
+ "read_state_machine %p scheduling on_complete errors for already "
+ "recvd initial md %p",
+ s, new_err);
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+ goto done;
+ }
+
+ s->initial_md_recvd = true;
+ new_err = fill_in_metadata(
+ exec_ctx, s, &s->to_read_initial_md, s->to_read_initial_md_flags,
+ s->recv_initial_md_op->payload->recv_initial_metadata
+ .recv_initial_metadata,
+ s->recv_initial_md_op->payload->recv_initial_metadata.recv_flags, NULL);
+ s->recv_initial_md_op->payload->recv_initial_metadata.recv_initial_metadata
+ ->deadline = s->deadline;
+ grpc_metadata_batch_clear(exec_ctx, &s->to_read_initial_md);
+ s->to_read_initial_md_filled = false;
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling initial-metadata-ready %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx,
+ s->recv_initial_md_op->payload->recv_initial_metadata
+ .recv_initial_metadata_ready,
+ GRPC_ERROR_REF(new_err));
+ if ((s->recv_initial_md_op != s->recv_message_op) &&
+ (s->recv_initial_md_op != s->recv_trailing_md_op)) {
+ INPROC_LOG(
+ GPR_DEBUG,
+ "read_state_machine %p scheduling initial-metadata-on-complete %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_initial_md_op->on_complete,
+ GRPC_ERROR_REF(new_err));
+ }
+ s->recv_initial_md_op = NULL;
+
+ if (new_err != GRPC_ERROR_NONE) {
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling on_complete errors2 %p", s,
+ new_err);
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+ goto done;
+ }
+ }
+ if (s->to_read_initial_md_filled) {
+ new_err = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Unexpected recv frame");
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+ goto done;
+ }
+ if (!slice_buffer_list_empty(&s->to_read_message) && s->recv_message_op) {
+ inproc_slice_byte_stream_init(
+ &s->recv_message_stream,
+ slice_buffer_list_pophead(&s->to_read_message));
+ *s->recv_message_op->payload->recv_message.recv_message =
+ &s->recv_message_stream.base;
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p scheduling message-ready", s);
+ GRPC_CLOSURE_SCHED(
+ exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+ GRPC_ERROR_NONE);
+ if (s->recv_message_op != s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling message-on-complete %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_message_op->on_complete,
+ GRPC_ERROR_REF(new_err));
+ }
+ s->recv_message_op = NULL;
+ }
+ if (s->to_read_trailing_md_filled) {
+ if (s->trailing_md_recvd) {
+ new_err =
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("Already recvd trailing md");
+ INPROC_LOG(
+ GPR_DEBUG,
+ "read_state_machine %p scheduling on_complete errors for already "
+ "recvd trailing md %p",
+ s, new_err);
+ fail_helper_locked(exec_ctx, s, GRPC_ERROR_REF(new_err));
+ goto done;
+ }
+ if (s->recv_message_op != NULL) {
+ // This message needs to be wrapped up because it will never be
+ // satisfied
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p scheduling message-ready",
+ s);
+ GRPC_CLOSURE_SCHED(
+ exec_ctx,
+ s->recv_message_op->payload->recv_message.recv_message_ready,
+ GRPC_ERROR_NONE);
+ if (s->recv_message_op != s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling message-on-complete %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_message_op->on_complete,
+ GRPC_ERROR_REF(new_err));
+ }
+ s->recv_message_op = NULL;
+ }
+ if (s->recv_trailing_md_op != NULL) {
+ // We wanted trailing metadata and we got it
+ s->trailing_md_recvd = true;
+ new_err =
+ fill_in_metadata(exec_ctx, s, &s->to_read_trailing_md, 0,
+ s->recv_trailing_md_op->payload
+ ->recv_trailing_metadata.recv_trailing_metadata,
+ NULL, NULL);
+ grpc_metadata_batch_clear(exec_ctx, &s->to_read_trailing_md);
+ s->to_read_trailing_md_filled = false;
+
+ // We should schedule the recv_trailing_md_op completion if
+ // 1. this stream is the client-side
+ // 2. this stream is the server-side AND has already sent its trailing md
+ // (If the server hasn't already sent its trailing md, it doesn't have
+ // a final status, so don't mark this op complete)
+ if (s->t->is_client || s->trailing_md_sent) {
+ INPROC_LOG(
+ GPR_DEBUG,
+ "read_state_machine %p scheduling trailing-md-on-complete %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+ GRPC_ERROR_REF(new_err));
+ s->recv_trailing_md_op = NULL;
+ needs_close = true;
+ } else {
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p server needs to delay handling "
+ "trailing-md-on-complete %p",
+ s, new_err);
+ }
+ } else {
+ INPROC_LOG(
+ GPR_DEBUG,
+ "read_state_machine %p has trailing md but not yet waiting for it",
+ s);
+ }
+ }
+ if (s->trailing_md_recvd && s->recv_message_op) {
+ // No further message will come on this stream, so finish off the
+ // recv_message_op
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p scheduling message-ready", s);
+ GRPC_CLOSURE_SCHED(
+ exec_ctx, s->recv_message_op->payload->recv_message.recv_message_ready,
+ GRPC_ERROR_NONE);
+ if (s->recv_message_op != s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "read_state_machine %p scheduling message-on-complete %p", s,
+ new_err);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_message_op->on_complete,
+ GRPC_ERROR_REF(new_err));
+ }
+ s->recv_message_op = NULL;
+ }
+ if (s->recv_message_op || s->recv_trailing_md_op) {
+ // Didn't get the item we wanted so we still need to get
+ // rescheduled
+ INPROC_LOG(GPR_DEBUG, "read_state_machine %p still needs closure %p %p", s,
+ s->recv_message_op, s->recv_trailing_md_op);
+ s->reads_needed = true;
+ }
+done:
+ if (needs_close) {
+ close_other_side_locked(exec_ctx, s, "read_state_machine");
+ close_stream_locked(exec_ctx, s);
+ }
+ gpr_mu_unlock(mu);
+ GRPC_ERROR_UNREF(new_err);
+}
+
+static grpc_closure do_nothing_closure;
+
+static bool cancel_stream_locked(grpc_exec_ctx *exec_ctx, inproc_stream *s,
+ grpc_error *error) {
+ bool ret = false; // was the cancel accepted
+ INPROC_LOG(GPR_DEBUG, "cancel_stream %p with %s", s,
+ grpc_error_string(error));
+ if (s->cancel_self_error == GRPC_ERROR_NONE) {
+ ret = true;
+ s->cancel_self_error = GRPC_ERROR_REF(error);
+ if (s->reads_needed) {
+ if (!s->read_closure_scheduled) {
+ GRPC_CLOSURE_SCHED(exec_ctx, &s->read_closure,
+ GRPC_ERROR_REF(s->cancel_self_error));
+ s->read_closure_scheduled = true;
+ }
+ s->reads_needed = false;
+ }
+ // Send trailing md to the other side indicating cancellation, even if we
+ // already have
+ s->trailing_md_sent = true;
+
+ grpc_metadata_batch cancel_md;
+ grpc_metadata_batch_init(&cancel_md);
+
+ inproc_stream *other = s->other_side;
+ grpc_metadata_batch *dest = (other == NULL) ? &s->write_buffer_trailing_md
+ : &other->to_read_trailing_md;
+ bool *destfilled = (other == NULL) ? &s->write_buffer_trailing_md_filled
+ : &other->to_read_trailing_md_filled;
+ fill_in_metadata(exec_ctx, s, &cancel_md, 0, dest, NULL, destfilled);
+ grpc_metadata_batch_destroy(exec_ctx, &cancel_md);
+
+ if (other != NULL) {
+ if (other->cancel_other_error == GRPC_ERROR_NONE) {
+ other->cancel_other_error = GRPC_ERROR_REF(s->cancel_self_error);
+ }
+ if (other->reads_needed) {
+ if (!other->read_closure_scheduled) {
+ GRPC_CLOSURE_SCHED(exec_ctx, &other->read_closure,
+ GRPC_ERROR_REF(other->cancel_other_error));
+ other->read_closure_scheduled = true;
+ }
+ other->reads_needed = false;
+ }
+ } else if (s->write_buffer_cancel_error == GRPC_ERROR_NONE) {
+ s->write_buffer_cancel_error = GRPC_ERROR_REF(s->cancel_self_error);
+ }
+
+ // if we are a server and already received trailing md but
+ // couldn't complete that because we hadn't yet sent out trailing
+ // md, now's the chance
+ if (!s->t->is_client && s->trailing_md_recvd && s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "cancel_stream %p scheduling trailing-md-on-complete %p", s,
+ s->cancel_self_error);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+ GRPC_ERROR_REF(s->cancel_self_error));
+ s->recv_trailing_md_op = NULL;
+ }
+ }
+
+ close_other_side_locked(exec_ctx, s, "cancel_stream:other_side");
+ close_stream_locked(exec_ctx, s);
+
+ GRPC_ERROR_UNREF(error);
+ return ret;
+}
+
+static void perform_stream_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_stream *gs,
+ grpc_transport_stream_op_batch *op) {
+ INPROC_LOG(GPR_DEBUG, "perform_stream_op %p %p %p", gt, gs, op);
+ inproc_stream *s = (inproc_stream *)gs;
+ gpr_mu *mu = &s->t->mu->mu; // save aside in case s gets closed
+ gpr_mu_lock(mu);
+
+ if (GRPC_TRACER_ON(grpc_inproc_trace)) {
+ if (op->send_initial_metadata) {
+ log_metadata(op->payload->send_initial_metadata.send_initial_metadata,
+ s->t->is_client, true);
+ }
+ if (op->send_trailing_metadata) {
+ log_metadata(op->payload->send_trailing_metadata.send_trailing_metadata,
+ s->t->is_client, false);
+ }
+ }
+ grpc_error *error = GRPC_ERROR_NONE;
+ grpc_closure *on_complete = op->on_complete;
+ if (on_complete == NULL) {
+ on_complete = &do_nothing_closure;
+ }
+
+ if (op->cancel_stream) {
+ // Call cancel_stream_locked without ref'ing the cancel_error because
+ // this function is responsible to make sure that that field gets unref'ed
+ cancel_stream_locked(exec_ctx, s, op->payload->cancel_stream.cancel_error);
+ // this op can complete without an error
+ } else if (s->cancel_self_error != GRPC_ERROR_NONE) {
+ // already self-canceled so still give it an error
+ error = GRPC_ERROR_REF(s->cancel_self_error);
+ } else {
+ INPROC_LOG(GPR_DEBUG, "perform_stream_op %p%s%s%s%s%s%s", s,
+ op->send_initial_metadata ? " send_initial_metadata" : "",
+ op->send_message ? " send_message" : "",
+ op->send_trailing_metadata ? " send_trailing_metadata" : "",
+ op->recv_initial_metadata ? " recv_initial_metadata" : "",
+ op->recv_message ? " recv_message" : "",
+ op->recv_trailing_metadata ? " recv_trailing_metadata" : "");
+ }
+
+ bool needs_close = false;
+
+ if (error == GRPC_ERROR_NONE &&
+ (op->send_initial_metadata || op->send_message ||
+ op->send_trailing_metadata)) {
+ inproc_stream *other = s->other_side;
+ if (s->t->is_closed) {
+ error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Endpoint already shutdown");
+ }
+ if (error == GRPC_ERROR_NONE && op->send_initial_metadata) {
+ grpc_metadata_batch *dest = (other == NULL) ? &s->write_buffer_initial_md
+ : &other->to_read_initial_md;
+ uint32_t *destflags = (other == NULL) ? &s->write_buffer_initial_md_flags
+ : &other->to_read_initial_md_flags;
+ bool *destfilled = (other == NULL) ? &s->write_buffer_initial_md_filled
+ : &other->to_read_initial_md_filled;
+ if (*destfilled || s->initial_md_sent) {
+ // The buffer is already in use; that's an error!
+ INPROC_LOG(GPR_DEBUG, "Extra initial metadata %p", s);
+ error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Extra initial metadata");
+ } else {
+ fill_in_metadata(
+ exec_ctx, s,
+ op->payload->send_initial_metadata.send_initial_metadata,
+ op->payload->send_initial_metadata.send_initial_metadata_flags,
+ dest, destflags, destfilled);
+ if (s->t->is_client) {
+ gpr_timespec *dl =
+ (other == NULL) ? &s->write_buffer_deadline : &other->deadline;
+ *dl = gpr_time_min(*dl, op->payload->send_initial_metadata
+ .send_initial_metadata->deadline);
+ s->initial_md_sent = true;
+ }
+ }
+ }
+ if (error == GRPC_ERROR_NONE && op->send_message) {
+ size_t remaining = op->payload->send_message.send_message->length;
+ grpc_slice_buffer *dest = slice_buffer_list_append(
+ (other == NULL) ? &s->write_buffer_message : &other->to_read_message);
+ do {
+ grpc_slice message_slice;
+ grpc_closure unused;
+ GPR_ASSERT(grpc_byte_stream_next(exec_ctx,
+ op->payload->send_message.send_message,
+ SIZE_MAX, &unused));
+ grpc_byte_stream_pull(exec_ctx, op->payload->send_message.send_message,
+ &message_slice);
+ remaining -= GRPC_SLICE_LENGTH(message_slice);
+ grpc_slice_buffer_add(dest, message_slice);
+ } while (remaining != 0);
+ }
+ if (error == GRPC_ERROR_NONE && op->send_trailing_metadata) {
+ grpc_metadata_batch *dest = (other == NULL) ? &s->write_buffer_trailing_md
+ : &other->to_read_trailing_md;
+ bool *destfilled = (other == NULL) ? &s->write_buffer_trailing_md_filled
+ : &other->to_read_trailing_md_filled;
+ if (*destfilled || s->trailing_md_sent) {
+ // The buffer is already in use; that's an error!
+ INPROC_LOG(GPR_DEBUG, "Extra trailing metadata %p", s);
+ error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Extra trailing metadata");
+ } else {
+ fill_in_metadata(
+ exec_ctx, s,
+ op->payload->send_trailing_metadata.send_trailing_metadata, 0, dest,
+ NULL, destfilled);
+ s->trailing_md_sent = true;
+ if (!s->t->is_client && s->trailing_md_recvd &&
+ s->recv_trailing_md_op) {
+ INPROC_LOG(GPR_DEBUG,
+ "perform_stream_op %p scheduling trailing-md-on-complete",
+ s);
+ GRPC_CLOSURE_SCHED(exec_ctx, s->recv_trailing_md_op->on_complete,
+ GRPC_ERROR_NONE);
+ s->recv_trailing_md_op = NULL;
+ needs_close = true;
+ }
+ }
+ }
+ if (other != NULL && other->reads_needed) {
+ if (!other->read_closure_scheduled) {
+ GRPC_CLOSURE_SCHED(exec_ctx, &other->read_closure, error);
+ other->read_closure_scheduled = true;
+ }
+ other->reads_needed = false;
+ }
+ }
+ if (error == GRPC_ERROR_NONE &&
+ (op->recv_initial_metadata || op->recv_message ||
+ op->recv_trailing_metadata)) {
+ // If there are any reads, mark it so that the read closure will react to
+ // them
+ if (op->recv_initial_metadata) {
+ s->recv_initial_md_op = op;
+ }
+ if (op->recv_message) {
+ s->recv_message_op = op;
+ }
+ if (op->recv_trailing_metadata) {
+ s->recv_trailing_md_op = op;
+ }
+
+ // We want to initiate the closure if:
+ // 1. There is initial metadata and something ready to take that
+ // 2. There is a message and something ready to take it
+ // 3. There is trailing metadata, even if nothing specifically wants
+ // that because that can shut down the message as well
+ if ((s->to_read_initial_md_filled && op->recv_initial_metadata) ||
+ ((!slice_buffer_list_empty(&s->to_read_message) ||
+ s->trailing_md_recvd) &&
+ op->recv_message) ||
+ (s->to_read_trailing_md_filled)) {
+ if (!s->read_closure_scheduled) {
+ GRPC_CLOSURE_SCHED(exec_ctx, &s->read_closure, GRPC_ERROR_NONE);
+ s->read_closure_scheduled = true;
+ }
+ } else {
+ s->reads_needed = true;
+ }
+ } else {
+ if (error != GRPC_ERROR_NONE) {
+ // Schedule op's read closures that we didn't push to read state machine
+ if (op->recv_initial_metadata) {
+ INPROC_LOG(
+ GPR_DEBUG,
+ "perform_stream_op error %p scheduling initial-metadata-ready %p",
+ s, error);
+ GRPC_CLOSURE_SCHED(
+ exec_ctx,
+ op->payload->recv_initial_metadata.recv_initial_metadata_ready,
+ GRPC_ERROR_REF(error));
+ }
+ if (op->recv_message) {
+ INPROC_LOG(
+ GPR_DEBUG,
+ "perform_stream_op error %p scheduling recv message-ready %p", s,
+ error);
+ GRPC_CLOSURE_SCHED(exec_ctx,
+ op->payload->recv_message.recv_message_ready,
+ GRPC_ERROR_REF(error));
+ }
+ }
+ INPROC_LOG(GPR_DEBUG, "perform_stream_op %p scheduling on_complete %p", s,
+ error);
+ GRPC_CLOSURE_SCHED(exec_ctx, on_complete, GRPC_ERROR_REF(error));
+ }
+ if (needs_close) {
+ close_other_side_locked(exec_ctx, s, "perform_stream_op:other_side");
+ close_stream_locked(exec_ctx, s);
+ }
+ gpr_mu_unlock(mu);
+ GRPC_ERROR_UNREF(error);
+}
+
+static void close_transport_locked(grpc_exec_ctx *exec_ctx,
+ inproc_transport *t) {
+ INPROC_LOG(GPR_DEBUG, "close_transport %p %d", t, t->is_closed);
+ grpc_connectivity_state_set(
+ exec_ctx, &t->connectivity, GRPC_CHANNEL_SHUTDOWN,
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("Closing transport."),
+ "close transport");
+ if (!t->is_closed) {
+ t->is_closed = true;
+ /* Also end all streams on this transport */
+ while (t->stream_list != NULL) {
+ // cancel_stream_locked also adjusts stream list
+ cancel_stream_locked(
+ exec_ctx, t->stream_list,
+ grpc_error_set_int(
+ GRPC_ERROR_CREATE_FROM_STATIC_STRING("Transport closed"),
+ GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
+ }
+ }
+}
+
+static void perform_transport_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_transport_op *op) {
+ inproc_transport *t = (inproc_transport *)gt;
+ INPROC_LOG(GPR_DEBUG, "perform_transport_op %p %p", t, op);
+ gpr_mu_lock(&t->mu->mu);
+ if (op->on_connectivity_state_change) {
+ grpc_connectivity_state_notify_on_state_change(
+ exec_ctx, &t->connectivity, op->connectivity_state,
+ op->on_connectivity_state_change);
+ }
+ if (op->set_accept_stream) {
+ t->accept_stream_cb = op->set_accept_stream_fn;
+ t->accept_stream_data = op->set_accept_stream_user_data;
+ }
+ if (op->on_consumed) {
+ GRPC_CLOSURE_SCHED(exec_ctx, op->on_consumed, GRPC_ERROR_NONE);
+ }
+
+ bool do_close = false;
+ if (op->goaway_error != GRPC_ERROR_NONE) {
+ do_close = true;
+ GRPC_ERROR_UNREF(op->goaway_error);
+ }
+ if (op->disconnect_with_error != GRPC_ERROR_NONE) {
+ do_close = true;
+ GRPC_ERROR_UNREF(op->disconnect_with_error);
+ }
+
+ if (do_close) {
+ close_transport_locked(exec_ctx, t);
+ }
+ gpr_mu_unlock(&t->mu->mu);
+}
+
+static void destroy_stream(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_stream *gs,
+ grpc_closure *then_schedule_closure) {
+ INPROC_LOG(GPR_DEBUG, "destroy_stream %p %p", gs, then_schedule_closure);
+ inproc_stream *s = (inproc_stream *)gs;
+ s->closure_at_destroy = then_schedule_closure;
+ really_destroy_stream(exec_ctx, s);
+}
+
+static void destroy_transport(grpc_exec_ctx *exec_ctx, grpc_transport *gt) {
+ inproc_transport *t = (inproc_transport *)gt;
+ INPROC_LOG(GPR_DEBUG, "destroy_transport %p", t);
+ gpr_mu_lock(&t->mu->mu);
+ close_transport_locked(exec_ctx, t);
+ gpr_mu_unlock(&t->mu->mu);
+ unref_transport(exec_ctx, t->other_side);
+ unref_transport(exec_ctx, t);
+}
+
+/*******************************************************************************
+ * Main inproc transport functions
+ */
+static void inproc_transports_create(grpc_exec_ctx *exec_ctx,
+ grpc_transport **server_transport,
+ const grpc_channel_args *server_args,
+ grpc_transport **client_transport,
+ const grpc_channel_args *client_args) {
+ INPROC_LOG(GPR_DEBUG, "inproc_transports_create");
+ inproc_transport *st = gpr_zalloc(sizeof(*st));
+ inproc_transport *ct = gpr_zalloc(sizeof(*ct));
+ // Share one lock between both sides since both sides get affected
+ st->mu = ct->mu = gpr_malloc(sizeof(*st->mu));
+ gpr_mu_init(&st->mu->mu);
+ gpr_ref_init(&st->mu->refs, 2);
+ st->base.vtable = &inproc_vtable;
+ ct->base.vtable = &inproc_vtable;
+ // Start each side of transport with 2 refs since they each have a ref
+ // to the other
+ gpr_ref_init(&st->refs, 2);
+ gpr_ref_init(&ct->refs, 2);
+ st->is_client = false;
+ ct->is_client = true;
+ grpc_connectivity_state_init(&st->connectivity, GRPC_CHANNEL_READY,
+ "inproc_server");
+ grpc_connectivity_state_init(&ct->connectivity, GRPC_CHANNEL_READY,
+ "inproc_client");
+ st->other_side = ct;
+ ct->other_side = st;
+ st->stream_list = NULL;
+ ct->stream_list = NULL;
+ *server_transport = (grpc_transport *)st;
+ *client_transport = (grpc_transport *)ct;
+}
+
+grpc_channel *grpc_inproc_channel_create(grpc_server *server,
+ grpc_channel_args *args,
+ void *reserved) {
+ GRPC_API_TRACE("grpc_inproc_channel_create(server=%p, args=%p)", 2,
+ (server, args));
+
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+ const grpc_channel_args *server_args = grpc_server_get_channel_args(server);
+
+ // Add a default authority channel argument for the client
+
+ grpc_arg default_authority_arg;
+ default_authority_arg.type = GRPC_ARG_STRING;
+ default_authority_arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
+ default_authority_arg.value.string = "inproc.authority";
+ grpc_channel_args *client_args =
+ grpc_channel_args_copy_and_add(args, &default_authority_arg, 1);
+
+ grpc_transport *server_transport;
+ grpc_transport *client_transport;
+ inproc_transports_create(&exec_ctx, &server_transport, server_args,
+ &client_transport, client_args);
+
+ grpc_server_setup_transport(&exec_ctx, server, server_transport, NULL,
+ server_args);
+ grpc_channel *channel =
+ grpc_channel_create(&exec_ctx, "inproc", client_args,
+ GRPC_CLIENT_DIRECT_CHANNEL, client_transport);
+
+ // Free up created channel args
+ grpc_channel_args_destroy(&exec_ctx, client_args);
+
+ // Now finish scheduled operations
+ grpc_exec_ctx_finish(&exec_ctx);
+
+ return channel;
+}
+
+/*******************************************************************************
+ * INTEGRATION GLUE
+ */
+
+static void set_pollset(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_stream *gs, grpc_pollset *pollset) {
+ // Nothing to do here
+}
+
+static void set_pollset_set(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
+ grpc_stream *gs, grpc_pollset_set *pollset_set) {
+ // Nothing to do here
+}
+
+static char *get_peer(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
+ return gpr_strdup("inproc");
+}
+
+static grpc_endpoint *get_endpoint(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
+ return NULL;
+}
+
+static const grpc_transport_vtable inproc_vtable = {
+ sizeof(inproc_stream), "inproc",
+ init_stream, set_pollset,
+ set_pollset_set, perform_stream_op,
+ perform_transport_op, destroy_stream,
+ destroy_transport, get_peer,
+ get_endpoint};
+
+/*******************************************************************************
+ * GLOBAL INIT AND DESTROY
+ */
+static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
+
+void grpc_inproc_transport_init(void) {
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, NULL,
+ grpc_schedule_on_exec_ctx);
+ g_empty_slice = grpc_slice_from_static_buffer(NULL, 0);
+
+ grpc_slice key_tmp = grpc_slice_from_static_string(":path");
+ g_fake_path_key = grpc_slice_intern(key_tmp);
+ grpc_slice_unref_internal(&exec_ctx, key_tmp);
+
+ g_fake_path_value = grpc_slice_from_static_string("/");
+
+ grpc_slice auth_tmp = grpc_slice_from_static_string(":authority");
+ g_fake_auth_key = grpc_slice_intern(auth_tmp);
+ grpc_slice_unref_internal(&exec_ctx, auth_tmp);
+
+ g_fake_auth_value = grpc_slice_from_static_string("inproc-fail");
+ grpc_exec_ctx_finish(&exec_ctx);
+}
+
+void grpc_inproc_transport_shutdown(void) {
+ grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+ grpc_slice_unref_internal(&exec_ctx, g_empty_slice);
+ grpc_slice_unref_internal(&exec_ctx, g_fake_path_key);
+ grpc_slice_unref_internal(&exec_ctx, g_fake_path_value);
+ grpc_slice_unref_internal(&exec_ctx, g_fake_auth_key);
+ grpc_slice_unref_internal(&exec_ctx, g_fake_auth_value);
+ grpc_exec_ctx_finish(&exec_ctx);
+}