code.delx.au - pulseaudio/blob - src/pulsecore/semaphore-win32.c

   1 /* $Id: mutex-win32.c 1426 2007-02-13 15:35:19Z ossman $ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <windows.h>
  29
  30 #include <pulse/xmalloc.h>
  31 #include <pulsecore/macro.h>
  32
  33 #include "semaphore.h"
  34
  35 struct pa_semaphore
  36 {
  37     HANDLE sema;
  38 };
  39
  40 pa_semaphore* pa_semaphore_new(unsigned value) {
  41     pa_semaphore *s;
  42
  43     s = pa_xnew(pa_semaphore, 1);
  44
  45     s->sema = CreateSemaphore(NULL, value, 32767, NULL);
  46     pa_assert(s->sema != NULL);
  47
  48     return s;
  49 }
  50
  51 void pa_semaphore_free(pa_semaphore *s) {
  52     pa_assert(s);
  53     CloseHandle(s->sema);
  54     pa_xfree(s);
  55 }
  56
  57 void pa_semaphore_post(pa_semaphore *s) {
  58     pa_assert(s);
  59     ReleaseSemaphore(s->sema, 1, NULL);
  60 }
  61
  62 void pa_semaphore_wait(pa_semaphore *s) {
  63     pa_assert(s);
  64     WaitForSingleObject(s->sema, INFINITE);
  65 }