| /* |
| * |
| * Copyright 2016, 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. |
| * |
| */ |
| |
| #ifndef GRPC_CORE_LIB_IOMGR_COMBINER_H |
| #define GRPC_CORE_LIB_IOMGR_COMBINER_H |
| |
| #include <stddef.h> |
| |
| #include <grpc/support/atm.h> |
| #include "src/core/lib/debug/trace.h" |
| #include "src/core/lib/iomgr/exec_ctx.h" |
| #include "src/core/lib/support/mpscq.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(grpc_workqueue *optional_workqueue); |
| |
| //#define GRPC_COMBINER_REFCOUNT_DEBUG |
| #ifdef GRPC_COMBINER_REFCOUNT_DEBUG |
| #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(exec_ctx, combiner, reason) \ |
| grpc_combiner_unref((exec_ctx), (combiner), __FILE__, __LINE__, (reason)) |
| #else |
| #define GRPC_COMBINER_DEBUG_ARGS |
| #define GRPC_COMBINER_REF(combiner, reason) grpc_combiner_ref((combiner)) |
| #define GRPC_COMBINER_UNREF(exec_ctx, combiner, reason) \ |
| grpc_combiner_unref((exec_ctx), (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_exec_ctx *exec_ctx, |
| grpc_combiner *lock GRPC_COMBINER_DEBUG_ARGS); |
| // Fetch a scheduler to schedule closures against |
| grpc_closure_scheduler *grpc_combiner_scheduler(grpc_combiner *lock, |
| bool covered_by_poller); |
| // Scheduler to execute \a action within the lock just prior to unlocking. |
| grpc_closure_scheduler *grpc_combiner_finally_scheduler(grpc_combiner *lock, |
| bool covered_by_poller); |
| |
| bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx *exec_ctx); |
| |
| extern grpc_tracer_flag grpc_combiner_trace; |
| |
| #endif /* GRPC_CORE_LIB_IOMGR_COMBINER_H */ |