source: trunk/src/wsock32/vsemaphore.cpp@ 21631

Last change on this file since 21631 was 8939, checked in by achimha, 23 years ago

vsemaphore.h is a local include file
File size: 3.5 KB
Line 
1/* $Id: vsemaphore.cpp,v 1.2 2002-07-30 15:34:52 achimha Exp $ */
2
3/*
4 * Semaphore class
5 *
6 * Copyright 2000 Sander van Leeuwen (sandervl@xs4all.nl)
7 *
8 *
9 * NOTE: When creating a shared semaphore object, you must call the ctor, wait &
10 * post with a 2nd parameter (HMTX *). This semaphore handle must be located
11 * in the local data segment of the dll.
12 * This enables other processes than the one that created the semaphore object
13 * to access it
14 *
15 * Project Odin Software License can be found in LICENSE.TXT
16 *
17 */
18#define INCL_DOSSEMAPHORES
19#define INCL_DOSERRORS
20#include <os2wrap.h> //Odin32 OS/2 api wrappers
21#include "vsemaphore.h"
22#include <win32type.h>
23#include <misc.h>
24
25/******************************************************************************/
26/******************************************************************************/
27VSemaphore::VSemaphore(int fShared, HEV *phSem)
28{
29 APIRET rc;
30
31 this->fShared = fShared;
32 rc = DosCreateEventSem(NULL, &sem_handle, (fShared == VSEMAPHORE_SHARED) ? DC_SEM_SHARED : 0, FALSE);
33 if(rc != 0) {
34 dprintf(("Error creating mutex %X\n", rc));
35 sem_handle = 0;
36 }
37 if(fShared) {
38 *phSem = sem_handle;
39 }
40}
41/******************************************************************************/
42/******************************************************************************/
43VSemaphore::~VSemaphore()
44{
45 if(sem_handle) {
46 DosCloseEventSem(sem_handle);
47 }
48}
49/******************************************************************************/
50/******************************************************************************/
51void VSemaphore::wait(ULONG timeout, HEV *phSem)
52{
53 APIRET rc;
54
55 if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
56 DebugInt3();
57 return;
58 }
59 if(sem_handle) {
60 if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
61 //must open the shared semaphore first (other process created it)
62 *phSem = sem_handle;
63 rc = DosOpenEventSem(NULL, phSem);
64 if(rc) {
65 DebugInt3();
66 }
67 }
68 rc = DosWaitEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle, timeout);
69 if(rc) {
70 DebugInt3();
71 }
72 }
73}
74/******************************************************************************/
75/******************************************************************************/
76void VSemaphore::reset(HMTX *phSem)
77{
78 APIRET rc;
79 ULONG count;
80
81 if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
82 DebugInt3();
83 return;
84 }
85 if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
86 //must open the shared semaphore first (other process created it)
87 *phSem = sem_handle;
88 rc = DosOpenEventSem(NULL, phSem);
89 if(rc) {
90 DebugInt3();
91 }
92 }
93 rc = DosResetEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle, &count);
94 if(rc != NO_ERROR && rc != ERROR_ALREADY_RESET) {
95 DebugInt3();
96 }
97}
98/******************************************************************************/
99/******************************************************************************/
100void VSemaphore::post(HMTX *phSem)
101{
102 APIRET rc;
103
104 if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
105 DebugInt3();
106 return;
107 }
108 if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
109 //must open the shared semaphore first (other process created it)
110 *phSem = sem_handle;
111 rc = DosOpenEventSem(NULL, phSem);
112 if(rc) {
113 DebugInt3();
114 }
115 }
116 rc = DosPostEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle);
117 if(rc != NO_ERROR && rc != ERROR_ALREADY_POSTED) {
118 DebugInt3();
119 }
120}
121/******************************************************************************/
122/******************************************************************************/
123
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