l3.libnazgul/src/free.c

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#include "libnazgul.h"
int msgFree(msgSpace * space, void * addr){
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printf("[ FREE 0x%08x ]\n",(int)addr);
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int poolIndex;
int bufferIndex;
int poolDataTabFd;
msgPoolData * poolDataTabAddr;
sem_t * poolDataTabSemFd;
msgPoolDataTabSemId ressourceSemId;
sem_t * ressourceSemFd;
/* on acquiert le droit de modifier les infos sur la ressource */
/* on protege le tableau des associations */
poolDataTabSemFd=sem_open(space->poolDataTabSemId,
O_CREAT,SEM_DEFAULT_MODE,1);
if (poolDataTabSemFd == SEM_FAILED){
NZG_ERROR("sem_open : ouverture de la ressource",
space->poolDataTabSemId);
return -1;
}
sem_wait(poolDataTabSemFd);
/* verifier le premier arg du shm_open */
poolDataTabFd=shm_open(space->poolDataTabId,
O_RDWR,
MSGSPACE_DEFAULT_MODE);
if (poolDataTabFd == -1 ) {
fprintf( stderr, "Allocate %s failed: %s\n",
(char*)space->poolDataTabId,
strerror( errno ) );
return -1;
}
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poolDataTabAddr = mmap( NULL, (space->poolNb) * sizeof( msgPoolData ),
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PROT_READ | PROT_WRITE,
MAP_SHARED, poolDataTabFd, 0 );
if( poolDataTabAddr == MAP_FAILED) {
fprintf( stderr, "mmap failed: %s\n",
strerror( errno ) );
return -1;
}
// TODO: verouiller semaphore DataInfo
int err;
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poolIndex=-1; bufferIndex=-1;
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err=msgBufferGetProcAttach(
poolDataTabAddr,
space->poolNb,
&poolIndex,
&bufferIndex,
addr
);
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printf("Found : %d\n",err);
printf("Freing pool: %d, buffer: %d\n",poolIndex,bufferIndex);
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msgBufferDetachProc(poolDataTabAddr,poolIndex,bufferIndex,addr);
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/* unmapper le msgPoolDataTab */
munmap(poolDataTabAddr,(space->poolNb) * sizeof( msgPoolData ));
close(poolDataTabFd);
// deverouiller semaphore DataInfo
sem_post(poolDataTabSemFd);
sem_close(poolDataTabSemFd);
// deverouiller semaphore ressource.
msgPoolSemIdIntern(ressourceSemId,space->id,poolIndex);
ressourceSemFd = sem_open(ressourceSemId,O_CREAT,SEM_DEFAULT_MODE,0);
if (ressourceSemFd == SEM_FAILED){
NZG_ERROR("sem_open",ressourceSemId);
return -1;
}
sem_post(ressourceSemFd);
sem_close(ressourceSemFd);
//sem_open ressource
//sem_post
//sem_close
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return 0;
}
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