#include "libnazgul.h"

int msgBufferDetachProc(msgPoolData * poolDataTabAddr,
			int poolIndex, int bufferIndex, void *addr)
{
	msgBufferInfoTabId bufferInfoTabId;
	int bufferInfoTabFd;
	msgBufferInfo *bufferInfoTabAddr;
	int bufferInfoNb;

	printf("Detaching %d,%d\n", poolIndex, bufferIndex);
	//récuperer l'ID du BufferInfoTab;

	strcpy(bufferInfoTabId, poolDataTabAddr[poolIndex].bufferInfoTabId);

	bufferInfoTabFd = shm_open(bufferInfoTabId, O_RDWR, SHM_DEFAULT_MODE);
	if (bufferInfoTabFd < 0) {
		NZG_ERROR("shm_open", bufferInfoTabId);
		return -1;
	}

  /** on regarde dans le tableau d'infos de buffer **/
	bufferInfoNb = poolDataTabAddr[poolIndex].bufferNb;
	bufferInfoTabAddr = mmap(NULL, bufferInfoNb * sizeof(msgBufferInfo),
				 PROT_READ | PROT_WRITE, MAP_SHARED,
				 bufferInfoTabFd, (off_t) 0);

	bufferInfoTabAddr[bufferIndex].ownerPid = (pid_t) - 1;
	bufferInfoTabAddr[bufferIndex].addr = NULL;

	if (munmap(bufferInfoTabAddr, bufferInfoNb * sizeof(msgBufferInfo)) < 0) {
		NZG_ERROR("munmap", bufferInfoTabId);
		return -1;
	}

	return 0;
}