block_t *block_cache_get(block_thread_state_t *block_thread_state, block_cache_t *cache, inode_cache_t *inode_cache, index_t *index, uint64_t ino, off_t off) {
block_t *block = NULL;
#ifdef MULTITHREADED
if (sem_wait(&cache->sem)) {
perror("sem_wait failed");
return NULL;
}
if (pthread_mutex_lock(&cache->mutex)) {
perror("pthread_mutex_lock failed");
goto post;
}
#endif
int match = 0;
block = _block_cache_get(cache, ino, off, &match);
#ifdef MULTITHREADED
if (pthread_mutex_unlock(&cache->mutex)) {
perror("pthread_mutex_unlock failed");
goto post;
}
#endif
if (!block) {
fprintf(stderr, "_block_cache_get failed\n");
goto post;
}
if (match) {
return block;
}
const inode_t *inode = inode_cache_lookup(inode_cache, ino);
if (!inode) {
fprintf(stderr, "inode_cache_lookup failed\n");
goto post;
}
if (block_setup(block, inode->ref, inode->ref_len)) {
fprintf(stderr, "block_setup failed\n");
goto post;
}
if (off > 0 && block_skip(block_thread_state, block, index, off) <= 0) {
fprintf(stderr, "block_skip failed\n");
goto post;
}
return block;
post:
#ifdef MULTITHREADED
if (block) {
_block_cache_put(cache, block, 0, 0);
}
if (sem_post(&cache->sem)) {
perror("sem_post failed");
}
#endif
return NULL;
}
// Initialize hardware devices
void
device_hardware_setup(void)
{
usb_setup();
ps2port_setup();
block_setup();
lpt_setup();
serial_setup();
cbfs_payload_setup();
}