70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
#include "libnazgul.h"
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int msgFree(msgSpace * space, void * addr){
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printf("[ FREE 0x%08x ]\n",(int)addr);
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int poolIndex;
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int bufferIndex;
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msgPoolData * poolDataTabAddr;
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sem_t * poolDataTabSemFd;
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msgPoolDataTabSemId ressourceSemId;
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sem_t * ressourceSemFd;
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/* on acquiert le droit de modifier les infos sur la ressource */
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/* on protege le tableau des associations */
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poolDataTabSemFd=sem_open(space->poolDataTabSemId,
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O_CREAT,SEM_DEFAULT_MODE,1);
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if (poolDataTabSemFd == SEM_FAILED){
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NZG_ERROR("sem_open : ouverture de la ressource",
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space->poolDataTabSemId);
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return -1;
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}
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sem_wait(poolDataTabSemFd);
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/* verifier le premier arg du shm_open */
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poolDataTabAddr = msgPoolDataTabOpen(space);
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// TODO: verouiller semaphore DataInfo
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int err;
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poolIndex=-1; bufferIndex=-1;
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err=msgBufferGetProcAttach(
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poolDataTabAddr,
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space->poolNb,
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&poolIndex,
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&bufferIndex,
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addr
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);
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printf("Found : %d\n",err);
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printf("Freing pool: %d, buffer: %d\n",poolIndex,bufferIndex);
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msgBufferDetachProc(poolDataTabAddr,poolIndex,bufferIndex,addr);
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/* unmapper le buffer */
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void * realAddr=addr;
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int bufferSize=poolDataTabAddr[poolIndex].bufferSize;
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int bufferNb=poolDataTabAddr[poolIndex].bufferNb;
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realAddr=realAddr-poolIndex*bufferSize;
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munmap(realAddr,bufferSize*bufferNb);
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msgPoolDataTabClose(space,poolDataTabAddr);
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// deverouiller semaphore DataInfo
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sem_post(poolDataTabSemFd);
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sem_close(poolDataTabSemFd);
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// deverouiller semaphore ressource.
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msgPoolSemIdIntern(ressourceSemId,space->id,poolIndex);
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ressourceSemFd = sem_open(ressourceSemId,O_CREAT,SEM_DEFAULT_MODE,0);
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if (ressourceSemFd == SEM_FAILED){
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NZG_ERROR("sem_open",ressourceSemId);
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goto ERROR;
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}
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sem_post(ressourceSemFd);
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sem_close(ressourceSemFd);
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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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