LCOV - code coverage report
Current view: top level - core/iomgr - workqueue_posix.c (source / functions) Hit Total Coverage
Test: tmp.CaZ6RjdVn2 Lines: 46 56 82.1 %
Date: 2015-12-10 22:15:08 Functions: 6 8 75.0 %

          Line data    Source code
       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include <grpc/support/port_platform.h>
      35             : 
      36             : #ifdef GPR_POSIX_SOCKET
      37             : 
      38             : #include "src/core/iomgr/workqueue.h"
      39             : 
      40             : #include <stdio.h>
      41             : 
      42             : #include <grpc/support/alloc.h>
      43             : #include <grpc/support/log.h>
      44             : #include <grpc/support/useful.h>
      45             : 
      46             : #include "src/core/iomgr/fd_posix.h"
      47             : 
      48             : static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, int success);
      49             : 
      50           1 : grpc_workqueue *grpc_workqueue_create(grpc_exec_ctx *exec_ctx) {
      51             :   char name[32];
      52           1 :   grpc_workqueue *workqueue = gpr_malloc(sizeof(grpc_workqueue));
      53           1 :   gpr_ref_init(&workqueue->refs, 1);
      54           1 :   gpr_mu_init(&workqueue->mu);
      55           1 :   workqueue->closure_list.head = workqueue->closure_list.tail = NULL;
      56           1 :   grpc_wakeup_fd_init(&workqueue->wakeup_fd);
      57           1 :   sprintf(name, "workqueue:%p", (void *)workqueue);
      58           1 :   workqueue->wakeup_read_fd =
      59           1 :       grpc_fd_create(GRPC_WAKEUP_FD_GET_READ_FD(&workqueue->wakeup_fd), name);
      60           1 :   grpc_closure_init(&workqueue->read_closure, on_readable, workqueue);
      61           1 :   grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
      62             :                          &workqueue->read_closure);
      63           1 :   return workqueue;
      64             : }
      65             : 
      66           1 : static void workqueue_destroy(grpc_exec_ctx *exec_ctx,
      67             :                               grpc_workqueue *workqueue) {
      68           1 :   GPR_ASSERT(grpc_closure_list_empty(workqueue->closure_list));
      69           1 :   grpc_fd_shutdown(exec_ctx, workqueue->wakeup_read_fd);
      70           1 : }
      71             : 
      72             : #ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
      73           0 : void grpc_workqueue_ref(grpc_workqueue *workqueue, const char *file, int line,
      74             :                         const char *reason) {
      75           0 :   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p   ref %d -> %d %s",
      76           0 :           workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count + 1,
      77             :           reason);
      78             : #else
      79             : void grpc_workqueue_ref(grpc_workqueue *workqueue) {
      80             : #endif
      81           0 :   gpr_ref(&workqueue->refs);
      82           0 : }
      83             : 
      84             : #ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
      85           1 : void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue,
      86             :                           const char *file, int line, const char *reason) {
      87           2 :   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "WORKQUEUE:%p unref %d -> %d %s",
      88           2 :           workqueue, (int)workqueue->refs.count, (int)workqueue->refs.count - 1,
      89             :           reason);
      90             : #else
      91             : void grpc_workqueue_unref(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
      92             : #endif
      93           1 :   if (gpr_unref(&workqueue->refs)) {
      94           1 :     workqueue_destroy(exec_ctx, workqueue);
      95             :   }
      96           1 : }
      97             : 
      98           1 : void grpc_workqueue_add_to_pollset(grpc_exec_ctx *exec_ctx,
      99             :                                    grpc_workqueue *workqueue,
     100             :                                    grpc_pollset *pollset) {
     101           1 :   grpc_pollset_add_fd(exec_ctx, pollset, workqueue->wakeup_read_fd);
     102           1 : }
     103             : 
     104           0 : void grpc_workqueue_flush(grpc_exec_ctx *exec_ctx, grpc_workqueue *workqueue) {
     105           0 :   gpr_mu_lock(&workqueue->mu);
     106           0 :   grpc_closure_list_move(&exec_ctx->closure_list, &workqueue->closure_list);
     107           0 :   gpr_mu_unlock(&workqueue->mu);
     108           0 : }
     109             : 
     110           2 : static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, int success) {
     111           2 :   grpc_workqueue *workqueue = arg;
     112             : 
     113           2 :   if (!success) {
     114           1 :     gpr_mu_destroy(&workqueue->mu);
     115             :     /* HACK: let wakeup_fd code know that we stole the fd */
     116           1 :     workqueue->wakeup_fd.read_fd = 0;
     117           1 :     grpc_wakeup_fd_destroy(&workqueue->wakeup_fd);
     118           1 :     grpc_fd_orphan(exec_ctx, workqueue->wakeup_read_fd, NULL, NULL, "destroy");
     119           1 :     gpr_free(workqueue);
     120             :   } else {
     121           1 :     gpr_mu_lock(&workqueue->mu);
     122           1 :     grpc_closure_list_move(&workqueue->closure_list, &exec_ctx->closure_list);
     123           1 :     grpc_wakeup_fd_consume_wakeup(&workqueue->wakeup_fd);
     124           1 :     gpr_mu_unlock(&workqueue->mu);
     125           1 :     grpc_fd_notify_on_read(exec_ctx, workqueue->wakeup_read_fd,
     126             :                            &workqueue->read_closure);
     127             :   }
     128           2 : }
     129             : 
     130           1 : void grpc_workqueue_push(grpc_workqueue *workqueue, grpc_closure *closure,
     131             :                          int success) {
     132           1 :   gpr_mu_lock(&workqueue->mu);
     133           1 :   if (grpc_closure_list_empty(workqueue->closure_list)) {
     134           1 :     grpc_wakeup_fd_wakeup(&workqueue->wakeup_fd);
     135             :   }
     136           1 :   grpc_closure_list_add(&workqueue->closure_list, closure, success);
     137           1 :   gpr_mu_unlock(&workqueue->mu);
     138           1 : }
     139             : 
     140             : #endif /* GPR_POSIX_SOCKET */

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