int send(const char* filename)
{
int flagid = 0;
int master_sender = is_sender(&flagid);
if (!master_sender)
exit(EXIT_SUCCESS);
int shmemid = 0;
void* smbuf = get_memptr( FILE_NAME_SHMEM_ATTACH,
BUF_SIZE + sizeof(long),
&shmemid);
CHECK(smbuf != (void*)-1, "Failed to get shared memory pointer");
long* nbytes_to_save = smbuf + BUF_SIZE;
*nbytes_to_save = 0;
CHECK(smbuf != (void*)-1, "Failed to get memory pointer");
int semid = get_sems( FILE_NAME_SHMEM_ATTACH, 5);
CHECK(semid != -1, "Failed to get semaphors id");
int cond = snd_protect_connection(semid);
CHECK(cond == 0, "Failed to set up protected connection");
int fileid = open(filename, O_RDONLY);
CHECK(fileid != -1, "Failed to open file to send");
struct sembuf rcv_activate[2] = {
{RCV_MUTEX, 1, 0},
{RCV_CONNECT, 1, 0}
};
cond = semop(semid, rcv_activate, 2);
CHECK(cond != -1, "Failed to connect to receiver");
struct sembuf mutexes[3] = {
{SND_MUTEX, 1, 0},
{RCV_MUTEX, -1, 0},
{SND_MUTEX, 0, 0}
};
int nbytes = 0;
while ((nbytes = read(fileid, smbuf, BUF_SIZE)) > 0)
{
*nbytes_to_save = nbytes;
OUT("# Sending\n");
cond = semop(semid, &mutexes[0], 1);
cond = semop(semid, &mutexes[1], 1);
cond = semop(semid, &mutexes[2], 1);
CHECK(cond == 0, "# Failed to set semaphors");
OUT("# Package sent\n");
}
OUT("# Finishing...\n");
*nbytes_to_save = -1;
cond = semop(semid, &mutexes[0], 1);
cond = semop(semid, &mutexes[1], 1);
cond = semop(semid, &mutexes[2], 1);
OUT("# Finished!\n");
cond = snd_clean(semid, fileid, shmemid, flagid);
exit(EXIT_SUCCESS);
}
void* Chip_to_Chip_Direct_to_Hypervisor_Zero_Copy_Endpoint::data_buf_for(int i) {
return &(all_data_bufs)[(2 * i + (is_sender() ? 1 : 0)) * data_buf_size];
}
