122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
#include "libnazgul.h"
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/*
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* spaceId : identifiant externe de l'espace de msg
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* queueNb : nombre de files de messages
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* poolNb : nombre de pool de buffers
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* queueNbCar : tableau de caracteristiques des different pool
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*/
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msgSpace * msgSpaceCreate(
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msgSpaceId spaceId,
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int queueNb,
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int poolNb,
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msgPool * queueNbCar ){
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msgSpaceId nzgId;
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//msgSpaceList mSList;
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int mSFd; // shm file descriptor
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int i;
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static int mSIdNum=-1;
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msgSpace * mSAddr;
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mSIdNum++;
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mSAddr=NULL;
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/** recuperation de la liste des msgSpace **/
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/* (creation si elle n'existe pas */
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/** on créee le nouvel element **/
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printf("PAGESIZE : %d\n",(int)PAGESIZE);
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msgSp2nzgId(spaceId,nzgId);
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mSFd=shm_open(
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nzgId,
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O_RDWR|O_CREAT|O_EXCL|O_TRUNC,
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MSGSPACE_DEFAULT_MODE
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);
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if (mSFd == -1 ) {
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fprintf( stderr, "msgSpace %s creation failed: %s\n",
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(char*)nzgId,
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strerror( errno ) );
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return NULL;
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}
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//on redimentionne l'element
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if (ftruncate(mSFd, sizeof(PAGESIZE)) == -1){
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fprintf( stderr, "msgSpace resizing failed: %s\n",
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strerror( errno ) );
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return NULL;
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}
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/* Map the memory object */
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mSAddr = mmap( 0, sizeof( *mSAddr ),
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PROT_READ | PROT_WRITE,
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MAP_SHARED, mSFd, 0 );
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if( mSAddr == MAP_FAILED ) {
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fprintf( stderr, "mmap failed: %s\n",
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strerror( errno ) );
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return NULL;
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}
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printf( "Map addr is 0x%08x\n", (int)mSAddr );
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/* on ferme le descripteur du fichier */
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close(mSFd);
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/* TODO: on ajoute spaceId a la liste des msgSpace connus */
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/* TODO: on crée queueNb files de messages */
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/* on créer poolNb pool de buffers */
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/* et on "attache" tout ce beau monde au spaceId */
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for (i=0;i<poolNb;i++){
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// creation d'une pool
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// mSAddr->
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}
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/* on renvoie un pointeur sur le bon spaceId */
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return mSAddr;
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}
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/*
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* spaceId : blabla
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*/
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msgSpace * msgSpaceOpen(msgSpaceId spaceId){
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int shmId;
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msgSpaceId nzgId;
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if (msgSp2nzgId(nzgId,spaceId));
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if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
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perror("shm_open");
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return NULL;
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}
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return NULL;
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}
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int msgSpaceDelete(msgSpaceId spaceId){
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//int shmId;
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msgSpaceId nzgId;
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if (msgSp2nzgId(nzgId,spaceId) == -1){
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//TODO: message d'erreur
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return -1;
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}
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if (shm_unlink(nzgId)<0){
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perror("shm_unlink");
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return -1;
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};
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return 0;
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}
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int msgSp2nzgId(msgSpaceId dest,const msgSpaceId src ){
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if (strlen(src)>MSGSPACE_ID_LEN){
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return -1;
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}
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/* sprintf(resNzgId,"/tmp/.nzg-%s",(char *)spaceId); */
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sprintf(dest,"/nzgSpace%s",(char *)src);
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return 0;
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}
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