63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#include "libnazgul.h"
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#include "ids.h"
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int msgPoolCreate(msgSpaceId externId, int poolIdx, int buffNb, int buffSize)
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{
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int poolFd;
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sem_t *ressourceSemFd;
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msgPoolId poolId;
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msgPoolSemId poolRessourceSemId;
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/* creation des buffers DEBUT */
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if (msgPoolIdIntern(poolId, externId, poolIdx) == -1) {
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fprintf(stderr, "msgPoolId creation failed for id %s\n",
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(char *)poolId);
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return -1;
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}
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poolFd =
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shm_open(poolId, O_RDWR | O_CREAT | O_EXCL | O_TRUNC,
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MSGSPACE_DEFAULT_MODE);
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if (poolFd == -1) {
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fprintf(stderr, "msgPool : %s creation failed: %s\n", poolId,
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strerror(errno));
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return -1;
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}
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if (ftruncate(poolFd, (buffSize * buffNb)) == -1) {
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fprintf(stderr, "msgPool resizing failed: %s\n",
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strerror(errno));
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return -1;
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}
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/* creation des buffers FIN */
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if (msgPoolSemIdIntern(poolRessourceSemId, externId, poolIdx) == -1) {
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fprintf(stderr, "msgPoolId creation failed for id %s\n",
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(char *)poolRessourceSemId);
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return -1;
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}
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// on met un semaphore sur le pool
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ressourceSemFd =
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sem_open(poolRessourceSemId, O_CREAT | O_EXCL, SEM_DEFAULT_MODE,
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buffNb);
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if (ressourceSemFd == SEM_FAILED) {
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NZG_ERROR("sem_open : creation de la ressource",
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poolRessourceSemId);
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goto ERROR;
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} else {
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printf("[ Created %s with %d ressources ]\n",
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poolRessourceSemId, buffNb);
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}
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//TODO: verrifier les erreurs sur l'ouverture de la sem
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sem_close(ressourceSemFd);
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// on met le pool a la taille voulue pour qu'il
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// puisse contenir les buffs
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close(poolFd);
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return 0;
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ERROR:
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return -1;
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}
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