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/*
*
* Copyright 2015-2016, 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_SURFACE_COMPLETION_QUEUE_H
#define GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_H
/* Internal API for completion queues */
#include <grpc/grpc.h>
#include "src/core/lib/iomgr/pollset.h"
/* These trace flags default to 1. The corresponding lines are only traced
if grpc_api_trace is also truthy */
extern int grpc_cq_pluck_trace;
extern int grpc_cq_event_timeout_trace;
extern int grpc_trace_operation_failures;
#ifndef NDEBUG
extern int grpc_trace_pending_tags;
#endif
typedef struct grpc_cq_completion {
/** user supplied tag */
void *tag;
/** done callback - called when this queue element is no longer
needed by the completion queue */
void (*done)(grpc_exec_ctx *exec_ctx, void *done_arg,
struct grpc_cq_completion *c);
void *done_arg;
/** next pointer; low bit is used to indicate success or not */
uintptr_t next;
} grpc_cq_completion;
//#define GRPC_CQ_REF_COUNT_DEBUG
#ifdef GRPC_CQ_REF_COUNT_DEBUG
void grpc_cq_internal_ref(grpc_completion_queue *cc, const char *reason,
const char *file, int line);
void grpc_cq_internal_unref(grpc_completion_queue *cc, const char *reason,
const char *file, int line);
#define GRPC_CQ_INTERNAL_REF(cc, reason) \
grpc_cq_internal_ref(cc, reason, __FILE__, __LINE__)
#define GRPC_CQ_INTERNAL_UNREF(cc, reason) \
grpc_cq_internal_unref(cc, reason, __FILE__, __LINE__)
#else
void grpc_cq_internal_ref(grpc_completion_queue *cc);
void grpc_cq_internal_unref(grpc_completion_queue *cc);
#define GRPC_CQ_INTERNAL_REF(cc, reason) grpc_cq_internal_ref(cc)
#define GRPC_CQ_INTERNAL_UNREF(cc, reason) grpc_cq_internal_unref(cc)
#endif
/* Flag that an operation is beginning: the completion channel will not finish
shutdown until a corrensponding grpc_cq_end_* call is made.
\a tag is currently used only in debug builds. */
void grpc_cq_begin_op(grpc_completion_queue *cc, void *tag);
/* Queue a GRPC_OP_COMPLETED operation; tag must correspond to the tag passed to
grpc_cq_begin_op */
void grpc_cq_end_op(grpc_exec_ctx *exec_ctx, grpc_completion_queue *cc,
void *tag, grpc_error *error,
void (*done)(grpc_exec_ctx *exec_ctx, void *done_arg,
grpc_cq_completion *storage),
void *done_arg, grpc_cq_completion *storage);
grpc_pollset *grpc_cq_pollset(grpc_completion_queue *cc);
grpc_completion_queue *grpc_cq_from_pollset(grpc_pollset *ps);
void grpc_cq_mark_non_listening_server_cq(grpc_completion_queue *cc);
bool grpc_cq_is_non_listening_server_cq(grpc_completion_queue *cc);
void grpc_cq_mark_server_cq(grpc_completion_queue *cc);
int grpc_cq_is_server_cq(grpc_completion_queue *cc);
grpc_cq_completion_type grpc_get_cq_completion_type(grpc_completion_queue *cc);
grpc_cq_polling_type grpc_get_cq_polling_type(grpc_completion_queue *cc);
grpc_completion_queue *grpc_completion_queue_create_internal(
grpc_cq_completion_type completion_type, grpc_cq_polling_type polling_type);
#endif /* GRPC_CORE_LIB_SURFACE_COMPLETION_QUEUE_H */
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