SMcommon.c

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#include "SMcommon.h"

int SharedMemory::shm_initialize(key_t shm_key, int shm_size,int *shrd_id,int *shm_ptr)
{
  *shrd_id = shmget(shm_key, shm_size, IPC_CREAT|0666);
  //  std::cout<<shrd_id<<std::endl;
  if( *shrd_id < 0 ){
    printf("[shm_initialize]: Can't Access to the Shared Memory !! \n" );
    return -1;
  }
  *shm_ptr = (int)shmat( *shrd_id, NULL, 0);
  memset( (void *)*shm_ptr, 0, shm_size );

  return  *shrd_id;
}


int  SharedMemory::shm_access(key_t shm_key, int shm_size, int *shrd_id, int *shm_ptr)
{
  /*-------- ACCESS TO CURRENT STATUS --------*/
  *shrd_id = shmget(shm_key, shm_size, 0444);
  if( *shrd_id < 0 ){
    printf("Can't Access to the Shared Memory !! \n" );
    return(-1);
  }
  *shm_ptr = (int)shmat( *shrd_id, (const void *)NULL, 0);
  
  /*-------- ENDING --------*/
  return *shrd_id;
}



int  SharedMemory::erase_shm(struct SHM_PARAM *param_ptr){
  shmctl(param_ptr->shd_param_id, IPC_RMID, 0);
  return(0);
}


SharedMemory::SharedMemory(){;}//std::cout<<"---constructer---"<<std::endl;}

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