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/*
*
* Copyright 2015, 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_INTERNAL_CORE_IOMGR_CLOSURE_H
#define GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H
#include <stddef.h>
struct grpc_closure;
typedef struct grpc_closure grpc_closure;
/* forward declaration for exec_ctx.h */
struct grpc_exec_ctx;
typedef struct grpc_exec_ctx grpc_exec_ctx;
typedef struct grpc_closure_list {
grpc_closure *head;
grpc_closure *tail;
} grpc_closure_list;
/** gRPC Callback definition.
*
* \param arg Arbitrary input.
* \param success An indication on the state of the iomgr. On false, cleanup
* actions should be taken (eg, shutdown). */
typedef void (*grpc_iomgr_cb_func)(grpc_exec_ctx *exec_ctx, void *arg,
int success);
/** A closure over a grpc_iomgr_cb_func. */
struct grpc_closure {
/** Bound callback. */
grpc_iomgr_cb_func cb;
/** Arguments to be passed to "cb". */
void *cb_arg;
/** Internal. A boolean indication to "cb" on the state of the iomgr.
* For instance, closures created during a shutdown would have this field set
* to false. */
int success;
/**< Internal. Do not touch */
struct grpc_closure *next;
};
/** Initializes \a closure with \a cb and \a cb_arg. */
void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
void *cb_arg);
/* Create a heap allocated closure: try to avoid except for very rare events */
grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg);
#define GRPC_CLOSURE_LIST_INIT \
{ NULL, NULL }
/** add \a closure to the end of \a list and set \a closure's success to \a
* success */
void grpc_closure_list_add(grpc_closure_list *list, grpc_closure *closure,
int success);
/** append all closures from \a src to \a dst and empty \a src. */
void grpc_closure_list_move(grpc_closure_list *src, grpc_closure_list *dst);
/** pop (return and remove) the head closure from \a list. */
grpc_closure *grpc_closure_list_pop(grpc_closure_list *list);
/** return whether \a list is empty. */
int grpc_closure_list_empty(grpc_closure_list list);
#endif /* GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H */
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