| 1 | /* $Id: vsemaphore.cpp,v 1.1 2000-03-23 19:23:48 sandervl Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Semaphore class
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| 5 | *
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| 6 | * Copyright 2000 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | *
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| 8 | *
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| 9 | * NOTE: When creating a shared semaphore object, you must call the ctor, wait &
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| 10 | * post with a 2nd parameter (HMTX *). This semaphore handle must be located
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| 11 | * in the local data segment of the dll.
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| 12 | * This enables other processes than the one that created the semaphore object
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| 13 | * to access it
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| 14 | *
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| 15 | * Project Odin Software License can be found in LICENSE.TXT
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| 16 | *
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| 17 | */
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| 18 | #define INCL_DOSSEMAPHORES
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| 19 | #define INCL_DOSERRORS
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| 20 | #include <os2wrap.h> //Odin32 OS/2 api wrappers
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| 21 | #include <VSemaphore.h>
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| 22 | #include <win32type.h>
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| 23 | #include <misc.h>
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| 24 |
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| 25 | #define DBG_LOCALLOG DBG_VSemaphore
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| 26 | #include "dbglocal.h"
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| 27 |
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| 28 | /******************************************************************************/
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| 29 | /******************************************************************************/
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| 30 | VSemaphore::VSemaphore(int fShared, HEV *phSem)
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| 31 | {
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| 32 | APIRET rc;
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| 33 |
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| 34 | this->fShared = fShared;
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| 35 | rc = DosCreateEventSem(NULL, &sem_handle, (fShared == VSEMAPHORE_SHARED) ? DC_SEM_SHARED : 0, FALSE);
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| 36 | if(rc != 0) {
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| 37 | dprintf(("Error creating mutex %X\n", rc));
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| 38 | sem_handle = 0;
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| 39 | }
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| 40 | if(fShared) {
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| 41 | *phSem = sem_handle;
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| 42 | }
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| 43 | }
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| 44 | /******************************************************************************/
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| 45 | /******************************************************************************/
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| 46 | VSemaphore::~VSemaphore()
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| 47 | {
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| 48 | if(sem_handle) {
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| 49 | DosCloseEventSem(sem_handle);
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| 50 | }
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| 51 | }
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| 52 | /******************************************************************************/
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| 53 | /******************************************************************************/
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| 54 | void VSemaphore::wait(ULONG timeout, HEV *phSem)
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| 55 | {
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| 56 | APIRET rc;
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| 57 |
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| 58 | if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
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| 59 | DebugInt3();
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| 60 | return;
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| 61 | }
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| 62 | if(sem_handle) {
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| 63 | if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
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| 64 | //must open the shared semaphore first (other process created it)
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| 65 | *phSem = sem_handle;
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| 66 | rc = DosOpenEventSem(NULL, phSem);
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| 67 | if(rc) {
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| 68 | DebugInt3();
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| 69 | }
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| 70 | }
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| 71 | rc = DosWaitEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle, timeout);
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| 72 | if(rc) {
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| 73 | DebugInt3();
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| 74 | }
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| 75 | }
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| 76 | }
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| 77 | /******************************************************************************/
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| 78 | /******************************************************************************/
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| 79 | void VSemaphore::reset(HMTX *phSem)
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| 80 | {
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| 81 | APIRET rc;
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| 82 | ULONG count;
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| 83 |
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| 84 | if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
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| 85 | DebugInt3();
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| 86 | return;
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| 87 | }
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| 88 | if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
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| 89 | //must open the shared semaphore first (other process created it)
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| 90 | *phSem = sem_handle;
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| 91 | rc = DosOpenEventSem(NULL, phSem);
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| 92 | if(rc) {
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| 93 | DebugInt3();
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| 94 | }
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| 95 | }
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| 96 | rc = DosResetEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle, &count);
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| 97 | if(rc != NO_ERROR && rc != ERROR_ALREADY_RESET) {
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| 98 | DebugInt3();
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| 99 | }
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| 100 | }
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| 101 | /******************************************************************************/
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| 102 | /******************************************************************************/
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| 103 | void VSemaphore::post(HMTX *phSem)
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| 104 | {
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| 105 | APIRET rc;
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| 106 |
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| 107 | if(fShared == VSEMAPHORE_SHARED && phSem == NULL) {
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| 108 | DebugInt3();
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| 109 | return;
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| 110 | }
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| 111 | if(fShared == VSEMAPHORE_SHARED && *phSem == 0) {
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| 112 | //must open the shared semaphore first (other process created it)
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| 113 | *phSem = sem_handle;
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| 114 | rc = DosOpenEventSem(NULL, phSem);
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| 115 | if(rc) {
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| 116 | DebugInt3();
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| 117 | }
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| 118 | }
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| 119 | rc = DosPostEventSem((fShared == VSEMAPHORE_SHARED) ? *phSem : sem_handle);
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| 120 | if(rc != NO_ERROR && rc != ERROR_ALREADY_POSTED) {
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| 121 | DebugInt3();
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| 122 | }
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| 123 | }
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| 124 | /******************************************************************************/
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| 125 | /******************************************************************************/
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| 126 |
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