1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_CORE_LIB_SURFACE_CALL_H 20 #define GRPC_CORE_LIB_SURFACE_CALL_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include "src/core/lib/channel/channel_stack.h" 25 #include "src/core/lib/channel/context.h" 26 #include "src/core/lib/gprpp/arena.h" 27 #include "src/core/lib/surface/api_trace.h" 28 #include "src/core/lib/surface/server.h" 29 30 #include <grpc/grpc.h> 31 #include <grpc/impl/codegen/compression_types.h> 32 33 typedef void (*grpc_ioreq_completion_func)(grpc_call* call, int success, 34 void* user_data); 35 36 typedef struct grpc_call_create_args { 37 grpc_channel* channel; 38 grpc_core::Server* server; 39 40 grpc_call* parent; 41 uint32_t propagation_mask; 42 43 grpc_completion_queue* cq; 44 /* if not NULL, it'll be used in lieu of cq */ 45 grpc_pollset_set* pollset_set_alternative; 46 47 const void* server_transport_data; 48 49 grpc_mdelem* add_initial_metadata; 50 size_t add_initial_metadata_count; 51 52 grpc_millis send_deadline; 53 } grpc_call_create_args; 54 55 /* Create a new call based on \a args. 56 Regardless of success or failure, always returns a valid new call into *call 57 */ 58 grpc_error* grpc_call_create(const grpc_call_create_args* args, 59 grpc_call** call); 60 61 void grpc_call_set_completion_queue(grpc_call* call, grpc_completion_queue* cq); 62 63 #ifndef NDEBUG 64 void grpc_call_internal_ref(grpc_call* call, const char* reason); 65 void grpc_call_internal_unref(grpc_call* call, const char* reason); 66 #define GRPC_CALL_INTERNAL_REF(call, reason) \ 67 grpc_call_internal_ref(call, reason) 68 #define GRPC_CALL_INTERNAL_UNREF(call, reason) \ 69 grpc_call_internal_unref(call, reason) 70 #else 71 void grpc_call_internal_ref(grpc_call* call); 72 void grpc_call_internal_unref(grpc_call* call); 73 #define GRPC_CALL_INTERNAL_REF(call, reason) grpc_call_internal_ref(call) 74 #define GRPC_CALL_INTERNAL_UNREF(call, reason) grpc_call_internal_unref(call) 75 #endif 76 77 grpc_core::Arena* grpc_call_get_arena(grpc_call* call); 78 79 grpc_call_stack* grpc_call_get_call_stack(grpc_call* call); 80 81 grpc_call_error grpc_call_start_batch_and_execute(grpc_call* call, 82 const grpc_op* ops, 83 size_t nops, 84 grpc_closure* closure); 85 86 /* gRPC core internal version of grpc_call_cancel that does not create 87 * exec_ctx. */ 88 void grpc_call_cancel_internal(grpc_call* call); 89 90 /* Given the top call_element, get the call object. */ 91 grpc_call* grpc_call_from_top_element(grpc_call_element* surface_element); 92 93 void grpc_call_log_batch(const char* file, int line, gpr_log_severity severity, 94 const grpc_op* ops, size_t nops); 95 96 /* Set a context pointer. 97 No thread safety guarantees are made wrt this value. */ 98 /* TODO(#9731): add exec_ctx to destroy */ 99 void grpc_call_context_set(grpc_call* call, grpc_context_index elem, 100 void* value, void (*destroy)(void* value)); 101 /* Get a context pointer. */ 102 void* grpc_call_context_get(grpc_call* call, grpc_context_index elem); 103 104 #define GRPC_CALL_LOG_BATCH(sev, ops, nops) \ 105 do { \ 106 if (GRPC_TRACE_FLAG_ENABLED(grpc_api_trace)) { \ 107 grpc_call_log_batch(sev, ops, nops); \ 108 } \ 109 } while (0) 110 111 uint8_t grpc_call_is_client(grpc_call* call); 112 113 /* Get the estimated memory size for a call BESIDES the call stack. Combined 114 * with the size of the call stack, it helps estimate the arena size for the 115 * initial call. */ 116 size_t grpc_call_get_initial_size_estimate(); 117 118 /* Return an appropriate compression algorithm for the requested compression \a 119 * level in the context of \a call. */ 120 grpc_compression_algorithm grpc_call_compression_for_level( 121 grpc_call* call, grpc_compression_level level); 122 123 extern grpc_core::TraceFlag grpc_call_error_trace; 124 extern grpc_core::TraceFlag grpc_compression_trace; 125 126 #endif /* GRPC_CORE_LIB_SURFACE_CALL_H */ 127