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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.
*
*/
#include <grpc/support/port_platform.h>
#ifdef GPR_POSIX_SOCKET
#include "src/core/lib/iomgr/workqueue.h"
#include <stdio.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/useful.h>
#include "src/core/lib/iomgr/fd_posix.h"
#include "src/core/lib/iomgr/pollset_posix.h"
static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success);
grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx) {
char name[32];
grpc_workqueue *workqueue = gpr_malloc(sizeof(grpc_workqueue));
gpr_ref_init(&workqueue->refs, 1);
gpr_mu_init(&workqueue->mu);
workqueue->closure_list.head = workqueue->closure_list.tail = NULL;
grpc_wakeup_fd_init(&workqueue->wakeup_fd);
sprintf(name, "workqueue:%p", (void *)workqueue);
workqueue->wakeup_read_fd =
grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&workqueue->wakeup_fd), name);
grpc_closure_init(&workqueue->read_closure, on_readable, workqueue);
grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
&workqueue->read_closure);
return workqueue;
}
static void workqueue_destroy(grpc_exec_ctx *exec_ctx,
grpc_workqueue *workqueue) {
GPR_ASSERT(grpc_closure_list_empty(workqueue->closure_list));
grpc_fd_shutdown(exec_ctx, workqueue->wakeup_read_fd);
}
#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
void grpc_workqueue_ref(grpc_workqueue *workqueue, const char *file, int line,
const char *reason) {
gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p ref %d -> %d %s",
workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count + 1,
reason);
#else
void grpc_workqueue_ref(grpc_workqueue *workqueue) {
#endif
gpr_ref(&workqueue->refs);
}
#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue,
const char *file, int line, const char *reason) {
gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p unref %d -> %d %s",
workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count - 1,
reason);
#else
void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
#endif
if (gpr_unref(&workqueue->refs)) {
workqueue_destroy(exec_ctx, workqueue);
}
}
void grpc_workqueue_add_to_pollset(grpc_exec_ctx *exec_ctx,
grpc_workqueue *workqueue,
grpc_pollset *pollset) {
grpc_pollset_add_fd(exec_ctx, pollset, workqueue->wakeup_read_fd);
}
void grpc_workqueue_flush(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
gpr_mu_lock(&workqueue->mu);
if (grpc_closure_list_empty(workqueue->closure_list)) {
grpc_wakeup_fd_wakeup(&workqueue->wakeup_fd);
}
grpc_exec_ctx_enqueue_list(exec_ctx, &workqueue->closure_list, NULL);
gpr_mu_unlock(&workqueue->mu);
}
static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
grpc_workqueue *workqueue = arg;
if (!success) {
gpr_mu_destroy(&workqueue->mu);
/* HACK: let wakeup_fd code know that we stole the fd */
workqueue->wakeup_fd.read_fd = 0;
grpc_wakeup_fd_destroy(&workqueue->wakeup_fd);
grpc_fd_orphan(exec_ctx, workqueue->wakeup_read_fd, NULL, NULL, "destroy");
gpr_free(workqueue);
} else {
gpr_mu_lock(&workqueue->mu);
grpc_exec_ctx_enqueue_list(exec_ctx, &workqueue->closure_list, NULL);
grpc_wakeup_fd_consume_wakeup(&workqueue->wakeup_fd);
gpr_mu_unlock(&workqueue->mu);
grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
&workqueue->read_closure);
}
}
void grpc_workqueue_push(grpc_workqueue *workqueue, grpc_closure *closure,
int success) {
gpr_mu_lock(&workqueue->mu);
if (grpc_closure_list_empty(workqueue->closure_list)) {
grpc_wakeup_fd_wakeup(&workqueue->wakeup_fd);
}
grpc_closure_list_add(&workqueue->closure_list, closure, success);
gpr_mu_unlock(&workqueue->mu);
}
#endif /* GPR_POSIX_SOCKET */
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