| /* |
| * |
| * Copyright 2016 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. |
| * |
| */ |
| |
| #ifndef GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_BUILDER_H |
| #define GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_BUILDER_H |
| |
| #include <stdbool.h> |
| |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/channel/channel_stack.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /// grpc_channel_stack_builder offers a programmatic interface to selected |
| /// and order channel filters |
| typedef struct grpc_channel_stack_builder grpc_channel_stack_builder; |
| typedef struct grpc_channel_stack_builder_iterator |
| grpc_channel_stack_builder_iterator; |
| |
| /// Create a new channel stack builder |
| grpc_channel_stack_builder* grpc_channel_stack_builder_create(void); |
| |
| /// Assign a name to the channel stack: \a name must be statically allocated |
| void grpc_channel_stack_builder_set_name(grpc_channel_stack_builder* builder, |
| const char* name); |
| |
| /// Set the target uri |
| void grpc_channel_stack_builder_set_target(grpc_channel_stack_builder* b, |
| const char* target); |
| |
| const char* grpc_channel_stack_builder_get_target( |
| grpc_channel_stack_builder* b); |
| |
| /// Attach \a transport to the builder (does not take ownership) |
| void grpc_channel_stack_builder_set_transport( |
| grpc_channel_stack_builder* builder, grpc_transport* transport); |
| |
| /// Fetch attached transport |
| grpc_transport* grpc_channel_stack_builder_get_transport( |
| grpc_channel_stack_builder* builder); |
| |
| /// Set channel arguments: copies args |
| void grpc_channel_stack_builder_set_channel_arguments( |
| grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, |
| const grpc_channel_args* args); |
| |
| /// Return a borrowed pointer to the channel arguments |
| const grpc_channel_args* grpc_channel_stack_builder_get_channel_arguments( |
| grpc_channel_stack_builder* builder); |
| |
| /// Begin iterating over already defined filters in the builder at the beginning |
| grpc_channel_stack_builder_iterator* |
| grpc_channel_stack_builder_create_iterator_at_first( |
| grpc_channel_stack_builder* builder); |
| |
| /// Begin iterating over already defined filters in the builder at the end |
| grpc_channel_stack_builder_iterator* |
| grpc_channel_stack_builder_create_iterator_at_last( |
| grpc_channel_stack_builder* builder); |
| |
| /// Is an iterator at the first element? |
| bool grpc_channel_stack_builder_iterator_is_first( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// Is an iterator at the end? |
| bool grpc_channel_stack_builder_iterator_is_end( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// What is the name of the filter at this iterator position? |
| const char* grpc_channel_stack_builder_iterator_filter_name( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// Move an iterator to the next item |
| bool grpc_channel_stack_builder_move_next( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// Move an iterator to the previous item |
| bool grpc_channel_stack_builder_move_prev( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// Return an iterator at \a filter_name, or at the end of the list if not |
| /// found. |
| grpc_channel_stack_builder_iterator* grpc_channel_stack_builder_iterator_find( |
| grpc_channel_stack_builder* builder, const char* filter_name); |
| |
| typedef void (*grpc_post_filter_create_init_func)( |
| grpc_channel_stack* channel_stack, grpc_channel_element* elem, void* arg); |
| |
| /// Add \a filter to the stack, after \a iterator. |
| /// Call \a post_init_func(..., \a user_data) once the channel stack is |
| /// created. |
| bool grpc_channel_stack_builder_add_filter_after( |
| grpc_channel_stack_builder_iterator* iterator, |
| const grpc_channel_filter* filter, |
| grpc_post_filter_create_init_func post_init_func, |
| void* user_data) GRPC_MUST_USE_RESULT; |
| |
| /// Add \a filter to the stack, before \a iterator. |
| /// Call \a post_init_func(..., \a user_data) once the channel stack is |
| /// created. |
| bool grpc_channel_stack_builder_add_filter_before( |
| grpc_channel_stack_builder_iterator* iterator, |
| const grpc_channel_filter* filter, |
| grpc_post_filter_create_init_func post_init_func, |
| void* user_data) GRPC_MUST_USE_RESULT; |
| |
| /// Add \a filter to the beginning of the filter list. |
| /// Call \a post_init_func(..., \a user_data) once the channel stack is |
| /// created. |
| bool grpc_channel_stack_builder_prepend_filter( |
| grpc_channel_stack_builder* builder, const grpc_channel_filter* filter, |
| grpc_post_filter_create_init_func post_init_func, |
| void* user_data) GRPC_MUST_USE_RESULT; |
| |
| /// Add \a filter to the end of the filter list. |
| /// Call \a post_init_func(..., \a user_data) once the channel stack is |
| /// created. |
| bool grpc_channel_stack_builder_append_filter( |
| grpc_channel_stack_builder* builder, const grpc_channel_filter* filter, |
| grpc_post_filter_create_init_func post_init_func, |
| void* user_data) GRPC_MUST_USE_RESULT; |
| |
| /// Remove any filter whose name is \a filter_name from \a builder. Returns true |
| /// if \a filter_name was not found. |
| bool grpc_channel_stack_builder_remove_filter( |
| grpc_channel_stack_builder* builder, const char* filter_name); |
| |
| /// Terminate iteration and destroy \a iterator |
| void grpc_channel_stack_builder_iterator_destroy( |
| grpc_channel_stack_builder_iterator* iterator); |
| |
| /// Destroy the builder, return the freshly minted channel stack in \a result. |
| /// Allocates \a prefix_bytes bytes before the channel stack |
| /// Returns the base pointer of the allocated block |
| /// \a initial_refs, \a destroy, \a destroy_arg are as per |
| /// grpc_channel_stack_init |
| grpc_error* grpc_channel_stack_builder_finish( |
| grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, |
| size_t prefix_bytes, int initial_refs, grpc_iomgr_cb_func destroy, |
| void* destroy_arg, void** result); |
| |
| /// Destroy the builder without creating a channel stack |
| void grpc_channel_stack_builder_destroy(grpc_exec_ctx* exec_ctx, |
| grpc_channel_stack_builder* builder); |
| |
| extern grpc_core::TraceFlag grpc_trace_channel_stack_builder; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* GRPC_CORE_LIB_CHANNEL_CHANNEL_STACK_BUILDER_H */ |