| /* |
| * |
| * 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_IOMGR_COMBINER_H |
| #define GRPC_CORE_LIB_IOMGR_COMBINER_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <stddef.h> |
| |
| #include <grpc/support/atm.h> |
| #include "src/core/lib/debug/trace.h" |
| #include "src/core/lib/gpr/mpscq.h" |
| #include "src/core/lib/iomgr/exec_ctx.h" |
| |
| // Provides serialized access to some resource. |
| // Each action queued on a combiner is executed serially in a borrowed thread. |
| // The actual thread executing actions may change over time (but there will only |
| // every be one at a time). |
| |
| // Initialize the lock, with an optional workqueue to shift load to when |
| // necessary |
| grpc_combiner* grpc_combiner_create(void); |
| |
| #ifndef NDEBUG |
| #define GRPC_COMBINER_DEBUG_ARGS \ |
| , const char *file, int line, const char *reason |
| #define GRPC_COMBINER_REF(combiner, reason) \ |
| grpc_combiner_ref((combiner), __FILE__, __LINE__, (reason)) |
| #define GRPC_COMBINER_UNREF(combiner, reason) \ |
| grpc_combiner_unref((combiner), __FILE__, __LINE__, (reason)) |
| #else |
| #define GRPC_COMBINER_DEBUG_ARGS |
| #define GRPC_COMBINER_REF(combiner, reason) grpc_combiner_ref((combiner)) |
| #define GRPC_COMBINER_UNREF(combiner, reason) grpc_combiner_unref((combiner)) |
| #endif |
| |
| // Ref/unref the lock, for when we're sharing the lock ownership |
| // Prefer to use the macros above |
| grpc_combiner* grpc_combiner_ref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS); |
| void grpc_combiner_unref(grpc_combiner* lock GRPC_COMBINER_DEBUG_ARGS); |
| // Fetch a scheduler to schedule closures against |
| grpc_closure_scheduler* grpc_combiner_scheduler(grpc_combiner* lock); |
| // Scheduler to execute \a action within the lock just prior to unlocking. |
| grpc_closure_scheduler* grpc_combiner_finally_scheduler(grpc_combiner* lock); |
| |
| bool grpc_combiner_continue_exec_ctx(); |
| |
| extern grpc_core::DebugOnlyTraceFlag grpc_combiner_trace; |
| |
| #endif /* GRPC_CORE_LIB_IOMGR_COMBINER_H */ |