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*corection de la fonction msgSpaceListUnlock

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rivka_zan 2004-02-23 16:02:25 +00:00 committed by Glenn Y. Rolland
parent 1007ca56c6
commit a1c27d5b98
1 changed files with 48 additions and 30 deletions
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78
src/nzg_spaceListLocking.c
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@ -4,43 +4,61 @@
// verouille le semaphore de la liste // verouille le semaphore de la liste
int msgSpaceListLock(){ int msgSpaceListLock(){
sem_t * spacesListSemFd; sem_t * spacesListSemFd;
msgSpaceListSemId spacesListSemId; msgSpaceListSemId spacesListSemId;
/*Ouverture d'un verrou d'un semafore*/ /*Ouverture d'un verrou d'un semafore*/
//TODO: remplacer par la bonne valeur d'initialisation du //TODO: remplacer par la bonne valeur d'initialisation du
//semaphore //semaphore
spacesListSemFd=sem_open(spacesListSemId,O_CREAT|O_EXCL,0666,1024); spacesListSemFd=sem_open(spacesListSemId,O_CREAT|O_EXCL,0666,1024);
if(spacesListSemFd==SEM_FAILED){ if(spacesListSemFd==SEM_FAILED){
NZG_ERROR("sem_open",spacesListSemId); NZG_ERROR("sem_open",spacesListSemId);
return -1; return -1;
} }
/*Pose d'un semafore et bloque*/ /*Pose d'un semaphore et le verrouille*/
if(sem_wait(spacesListSemFd)==-1){ if(sem_wait(spacesListSemFd)==-1){
NZG_ERROR("sem_wait",spacesListSemId); NZG_ERROR("sem_wait",spacesListSemId);
return -1; return -1;
} }
return 0;
/* Ferme le semaphore*/
if(sem_close(spacesListSemFd)==-1){
NZG_ERROR("sem_close",spacesListSemId);
return -1;
}
return 0;
} }
// deverouille le semaphore de la liste // deverouille le semaphore de la liste
int msgSpaceListUnlock(){ int msgSpaceListUnlock(){
sem_t * spacesListSemFd; sem_t * spacesListSemFd;
msgSpaceListSemId spacesListSemId; msgSpaceListSemId spacesListSemId;
/* Ferme le semaphore*/ /*Ouverture dun semaphore*/
if(sem_close(spacesListSemFd)==-1){ spacesListSemFd=sem_open(spacesListSemId,O_CREAT|O_EXCL,0666,1024);
NZG_ERROR("sem_close",spacesListSemId); if(spacesListSemFd==SEM_FAILED){
return -1; NZG_ERROR("sem_open",spacesListSemId);
} return -1;
/*semaphore non bloquant*/ }
if (sem_trywait(spacesListSemFd)==-1){
NZG_ERROR("sem_trywait",spacesListSemId);
return -1; /*Relachement du semaphore*/
} if(sem_post(spacesListSemFd)==-1){
return 0; NZG_ERROR("sem_relache",spacesListSemId);
return -1;
}
/* Ferme le semaphore*/
if(sem_close(spacesListSemFd)==-1){
NZG_ERROR("sem_close",spacesListSemId);
return -1;
}
return 0;
}; };