1*b1cdbd2cSJim Jagielski /**************************************************************
2*b1cdbd2cSJim Jagielski *
3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one
4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file
5*b1cdbd2cSJim Jagielski * distributed with this work for additional information
6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file
7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the
8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance
9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at
10*b1cdbd2cSJim Jagielski *
11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0
12*b1cdbd2cSJim Jagielski *
13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing,
14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an
15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the
17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations
18*b1cdbd2cSJim Jagielski * under the License.
19*b1cdbd2cSJim Jagielski *
20*b1cdbd2cSJim Jagielski *************************************************************/
21*b1cdbd2cSJim Jagielski
22*b1cdbd2cSJim Jagielski
23*b1cdbd2cSJim Jagielski
24*b1cdbd2cSJim Jagielski #include "system.h"
25*b1cdbd2cSJim Jagielski
26*b1cdbd2cSJim Jagielski #include <osl/diagnose.h>
27*b1cdbd2cSJim Jagielski #include <osl/semaphor.h>
28*b1cdbd2cSJim Jagielski
29*b1cdbd2cSJim Jagielski /*
30*b1cdbd2cSJim Jagielski Implemetation notes:
31*b1cdbd2cSJim Jagielski The void* represented by oslSemaphore is used
32*b1cdbd2cSJim Jagielski to store a WIN32 HANDLE.
33*b1cdbd2cSJim Jagielski */
34*b1cdbd2cSJim Jagielski
35*b1cdbd2cSJim Jagielski
36*b1cdbd2cSJim Jagielski /*****************************************************************************/
37*b1cdbd2cSJim Jagielski /* osl_createSemaphore */
38*b1cdbd2cSJim Jagielski /*****************************************************************************/
osl_createSemaphore(sal_uInt32 initialCount)39*b1cdbd2cSJim Jagielski oslSemaphore SAL_CALL osl_createSemaphore(sal_uInt32 initialCount)
40*b1cdbd2cSJim Jagielski {
41*b1cdbd2cSJim Jagielski oslSemaphore Semaphore;
42*b1cdbd2cSJim Jagielski
43*b1cdbd2cSJim Jagielski Semaphore= CreateSemaphore(0, initialCount, INT_MAX, 0);
44*b1cdbd2cSJim Jagielski
45*b1cdbd2cSJim Jagielski /* create failed? */
46*b1cdbd2cSJim Jagielski if((HANDLE)Semaphore == INVALID_HANDLE_VALUE)
47*b1cdbd2cSJim Jagielski {
48*b1cdbd2cSJim Jagielski Semaphore= 0;
49*b1cdbd2cSJim Jagielski }
50*b1cdbd2cSJim Jagielski
51*b1cdbd2cSJim Jagielski return Semaphore;
52*b1cdbd2cSJim Jagielski }
53*b1cdbd2cSJim Jagielski
54*b1cdbd2cSJim Jagielski /*****************************************************************************/
55*b1cdbd2cSJim Jagielski /* osl_destroySemaphore */
56*b1cdbd2cSJim Jagielski /*****************************************************************************/
osl_destroySemaphore(oslSemaphore Semaphore)57*b1cdbd2cSJim Jagielski void SAL_CALL osl_destroySemaphore(oslSemaphore Semaphore)
58*b1cdbd2cSJim Jagielski {
59*b1cdbd2cSJim Jagielski
60*b1cdbd2cSJim Jagielski
61*b1cdbd2cSJim Jagielski if(Semaphore != 0)
62*b1cdbd2cSJim Jagielski {
63*b1cdbd2cSJim Jagielski CloseHandle((HANDLE)Semaphore);
64*b1cdbd2cSJim Jagielski }
65*b1cdbd2cSJim Jagielski
66*b1cdbd2cSJim Jagielski }
67*b1cdbd2cSJim Jagielski
68*b1cdbd2cSJim Jagielski /*****************************************************************************/
69*b1cdbd2cSJim Jagielski /* osl_acquireSemaphore */
70*b1cdbd2cSJim Jagielski /*****************************************************************************/
osl_acquireSemaphore(oslSemaphore Semaphore)71*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL osl_acquireSemaphore(oslSemaphore Semaphore)
72*b1cdbd2cSJim Jagielski {
73*b1cdbd2cSJim Jagielski OSL_ASSERT(Semaphore != 0);
74*b1cdbd2cSJim Jagielski
75*b1cdbd2cSJim Jagielski switch ( WaitForSingleObject( (HANDLE)Semaphore, INFINITE ) )
76*b1cdbd2cSJim Jagielski {
77*b1cdbd2cSJim Jagielski case WAIT_OBJECT_0:
78*b1cdbd2cSJim Jagielski return sal_True;
79*b1cdbd2cSJim Jagielski
80*b1cdbd2cSJim Jagielski default:
81*b1cdbd2cSJim Jagielski return (sal_False);
82*b1cdbd2cSJim Jagielski }
83*b1cdbd2cSJim Jagielski }
84*b1cdbd2cSJim Jagielski
85*b1cdbd2cSJim Jagielski /*****************************************************************************/
86*b1cdbd2cSJim Jagielski /* osl_tryToAcquireSemaphore */
87*b1cdbd2cSJim Jagielski /*****************************************************************************/
osl_tryToAcquireSemaphore(oslSemaphore Semaphore)88*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL osl_tryToAcquireSemaphore(oslSemaphore Semaphore)
89*b1cdbd2cSJim Jagielski {
90*b1cdbd2cSJim Jagielski OSL_ASSERT(Semaphore != 0);
91*b1cdbd2cSJim Jagielski return (sal_Bool)(WaitForSingleObject((HANDLE)Semaphore, 0) == WAIT_OBJECT_0);
92*b1cdbd2cSJim Jagielski }
93*b1cdbd2cSJim Jagielski
94*b1cdbd2cSJim Jagielski
95*b1cdbd2cSJim Jagielski /*****************************************************************************/
96*b1cdbd2cSJim Jagielski /* osl_releaseSemaphore */
97*b1cdbd2cSJim Jagielski /*****************************************************************************/
osl_releaseSemaphore(oslSemaphore Semaphore)98*b1cdbd2cSJim Jagielski sal_Bool SAL_CALL osl_releaseSemaphore(oslSemaphore Semaphore)
99*b1cdbd2cSJim Jagielski {
100*b1cdbd2cSJim Jagielski OSL_ASSERT(Semaphore != 0);
101*b1cdbd2cSJim Jagielski
102*b1cdbd2cSJim Jagielski /* increase count by one, not interested in previous count */
103*b1cdbd2cSJim Jagielski return (sal_Bool)(ReleaseSemaphore((HANDLE)Semaphore, 1, NULL) != FALSE);
104*b1cdbd2cSJim Jagielski }
105*b1cdbd2cSJim Jagielski
106*b1cdbd2cSJim Jagielski
107*b1cdbd2cSJim Jagielski
108