glenux-school/l3.libnazgul
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glenux 2004-02-23 19:07:40 +00:00 committed by Glenn Y. Rolland
parent 9718406b73
commit 39205742fd
1 changed files with 17 additions and 6 deletions
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17
src/queueLock.c
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@ -1,14 +1,25 @@
#include "libnazgul.h" #include "libnazgul.h"
int queueLock(msgSpaceId spaceid,int queueIdx){ int queueLock(msgSpaceId externId,int queueIdx){
sem_t * queueSemFd; sem_t * queueSemFd;
msgQueueSemId queueSemId; msgQueueSemId queueSemId;
queueSemFd=sem_open(queueSemId,O_CREAT|O_EXCL,0666,1); msgQueueSemIdIntern(queueSemId,externId);
queueSemFd=sem_open(queueSemId,O_CREAT|O_EXCL,SEM_DEFAULT_MODE,1);
if(queueSemFd==SEM_FAILED){ if(queueSemFd==SEM_FAILED){
NZG_ERROR("sem_open",queueSemId); NZG_ERROR("sem_open",queueSemId);
return -1; goto ERROR;
} }
if(sem_wait(queueSemFd)==-1){
NZG_ERROR("sem_wait",queueSemId);
goto ERROR;
}
sem_close(queueSemFd);
return 0;
ERROR:
return -1; return -1;
} }