l3.libnazgul/src/poolCreate.c

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#include "libnazgul.h"
#include "nzg_ids.h"
int msgPoolCreate(
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msgSpaceId externId,
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int poolIdx,
int buffNb,
int buffSize
) {
int poolFd;
sem_t * ressourceSemFd;
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msgPoolId poolId;
msgPoolSemId poolRessourceSemId;
/* 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", (char*)poolId );
return -1;
}
poolFd=shm_open(poolId,O_RDWR|O_CREAT|O_EXCL|O_TRUNC,MSGSPACE_DEFAULT_MODE);
if (poolFd == -1 ) {
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fprintf( stderr, "msgPool : %s creation failed: %s\n",poolId,
strerror( errno ) );
return -1;
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}
if (ftruncate(poolFd, (buffSize*buffNb)) == -1){
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fprintf( stderr, "msgPool resizing failed: %s\n",
strerror( errno ) );
return -1;
}
/* creation des buffers FIN */
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;
}
// on met un semaphore sur le pool
ressourceSemFd = sem_open(poolRessourceSemId, O_CREAT|O_EXCL,SEM_DEFAULT_MODE, buffNb);
if (ressourceSemFd == SEM_FAILED){
NZG_ERROR("sem_open : creation de la ressource",poolRessourceSemId);
return -1;
} else {
NZG_ERROR("sem_open : creation oki",poolRessourceSemId);
}
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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
// puisse contenir les buffs
close(poolFd);
return 0;
}