static int snd_pcm_shm_new_rbptr(snd_pcm_t *pcm, snd_pcm_shm_t *shm,
snd_pcm_rbptr_t *rbptr, volatile snd_pcm_shm_rbptr_t *shm_rbptr)
{
if (!shm_rbptr->use_mmap) {
if (&pcm->hw == rbptr)
snd_pcm_set_hw_ptr(pcm, &shm_rbptr->ptr, -1, 0);
else
snd_pcm_set_appl_ptr(pcm, &shm_rbptr->ptr, -1, 0);
} else {
void *ptr;
size_t mmap_size, mmap_offset, offset;
int fd;
long result;
shm->ctrl->cmd = &pcm->hw == rbptr ? SND_PCM_IOCTL_HW_PTR_FD : SND_PCM_IOCTL_APPL_PTR_FD;
result = snd_pcm_shm_action_fd0(pcm, &fd);
if (result < 0)
return result;
mmap_size = page_ptr(shm_rbptr->offset, sizeof(snd_pcm_uframes_t), &offset, &mmap_offset);
ptr = mmap(NULL, mmap_size, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED, fd, mmap_offset);
if (ptr == MAP_FAILED || ptr == NULL) {
SYSERR("shm rbptr mmap failed");
return -errno;
}
if (&pcm->hw == rbptr)
snd_pcm_set_hw_ptr(pcm, (snd_pcm_uframes_t *)((char *)ptr + offset), fd, shm_rbptr->offset);
else
snd_pcm_set_appl_ptr(pcm, (snd_pcm_uframes_t *)((char *)ptr + offset), fd, shm_rbptr->offset);
}
return 0;
}
bin_index_t::page_ptr bin_index_t::file_node::create_page() const
{
return page_ptr(new page_t(aligned_key_len,parent.page_max_size));
}
void
Restore::restore_next(Signal* signal, FilePtr file_ptr)
{
Uint32 *data, len= 0;
Uint32 status = file_ptr.p->m_status;
Uint32 page_count = file_ptr.p->m_pages.getSize();
do
{
Uint32 left= file_ptr.p->m_bytes_left;
if (left < 8)
{
jam();
/**
* Not enough bytes to read header
*/
break;
}
Ptr<GlobalPage> page_ptr(0,0), next_page_ptr(0,0);
m_global_page_pool.getPtr(page_ptr, file_ptr.p->m_current_page_ptr_i);
List::Iterator it;
Uint32 pos= file_ptr.p->m_current_page_pos;
if(status & File::READING_RECORDS)
{
jam();
/**
* We are reading records
*/
len= ntohl(* (page_ptr.p->data + pos)) + 1;
ndbrequire(len < GLOBAL_PAGE_SIZE_WORDS);
}
else
{
jam();
/**
* Section length is in 2 word
*/
if(pos + 1 == GLOBAL_PAGE_SIZE_WORDS)
{
jam();
/**
* But that's stored on next page...
* and since we have atleast 8 bytes left in buffer
* we can be sure that that's in buffer
*/
LocalDataBuffer<15> pages(m_databuffer_pool, file_ptr.p->m_pages);
Uint32 next_page = file_ptr.p->m_current_page_index + 1;
pages.position(it, next_page % page_count);
m_global_page_pool.getPtr(next_page_ptr, * it.data);
len= ntohl(* next_page_ptr.p->data);
}
else
{
jam();
len= ntohl(* (page_ptr.p->data + pos + 1));
}
}
if (file_ptr.p->m_status & File::FIRST_READ)
{
jam();
len= 3;
file_ptr.p->m_status &= ~(Uint32)File::FIRST_READ;
}
if (4 * len > left)
{
jam();
/**
* Not enought bytes to read "record"
*/
if (unlikely((status & File:: FILE_THREAD_RUNNING) == 0))
{
crash_during_restore(file_ptr, __LINE__, 0);
}
len= 0;
break;
}
/**
* Entire record is in buffer
*/
if(pos + len >= GLOBAL_PAGE_SIZE_WORDS)
{
jam();
/**
* But it's split over pages
*/
if(next_page_ptr.p == 0)
{
LocalDataBuffer<15> pages(m_databuffer_pool, file_ptr.p->m_pages);
Uint32 next_page = file_ptr.p->m_current_page_index + 1;
pages.position(it, next_page % page_count);
m_global_page_pool.getPtr(next_page_ptr, * it.data);
}
file_ptr.p->m_current_page_ptr_i = next_page_ptr.i;
file_ptr.p->m_current_page_pos = (pos + len) - GLOBAL_PAGE_SIZE_WORDS;
file_ptr.p->m_current_page_index =
(file_ptr.p->m_current_page_index + 1) % page_count;
if (len <= GLOBAL_PAGE_SIZE_WORDS)
{
jam();
Uint32 first = (GLOBAL_PAGE_SIZE_WORDS - pos);
// wl4391_todo removing valgrind overlap warning for now
memmove(page_ptr.p, page_ptr.p->data+pos, 4 * first);
memcpy(page_ptr.p->data+first, next_page_ptr.p, 4 * (len - first));
data= page_ptr.p->data;
}
else
{
jam();
/**
* A table definition can be larger than one page...
* when that happens copy it out to side buffer
*
* First copy part belonging to page_ptr
* Then copy full middle pages (moving forward in page-list)
* Last copy last part
*/
Uint32 save = len;
assert(len <= NDB_ARRAY_SIZE(m_table_buf));
Uint32 * dst = m_table_buf;
/**
* First
*/
Uint32 first = (GLOBAL_PAGE_SIZE_WORDS - pos);
memcpy(dst, page_ptr.p->data+pos, 4 * first);
len -= first;
dst += first;
/**
* Middle
*/
while (len > GLOBAL_PAGE_SIZE_WORDS)
{
jam();
memcpy(dst, next_page_ptr.p, 4 * GLOBAL_PAGE_SIZE_WORDS);
len -= GLOBAL_PAGE_SIZE_WORDS;
dst += GLOBAL_PAGE_SIZE_WORDS;
{
LocalDataBuffer<15> pages(m_databuffer_pool, file_ptr.p->m_pages);
Uint32 next_page = (file_ptr.p->m_current_page_index + 1) % page_count;
pages.position(it, next_page % page_count);
m_global_page_pool.getPtr(next_page_ptr, * it.data);
file_ptr.p->m_current_page_ptr_i = next_page_ptr.i;
file_ptr.p->m_current_page_index = next_page;
}
}
/**
* last
*/
memcpy(dst, next_page_ptr.p, 4 * len);
file_ptr.p->m_current_page_pos = len;
/**
* Set pointer and len
*/
len = save;
data = m_table_buf;
}
}
else
{
file_ptr.p->m_current_page_pos = pos + len;
data= page_ptr.p->data+pos;
}
file_ptr.p->m_bytes_left -= 4*len;
if(status & File::READING_RECORDS)
{
if(len == 1)
{
file_ptr.p->m_status = status & ~(Uint32)File::READING_RECORDS;
}
else
{
parse_record(signal, file_ptr, data, len);
}
}
else
{
switch(ntohl(* data)){
case BackupFormat::FILE_HEADER:
parse_file_header(signal, file_ptr, data-3, len+3);
break;
case BackupFormat::FRAGMENT_HEADER:
file_ptr.p->m_status = status | File::READING_RECORDS;
parse_fragment_header(signal, file_ptr, data, len);
break;
case BackupFormat::FRAGMENT_FOOTER:
parse_fragment_footer(signal, file_ptr, data, len);
break;
case BackupFormat::TABLE_LIST:
parse_table_list(signal, file_ptr, data, len);
break;
case BackupFormat::TABLE_DESCRIPTION:
parse_table_description(signal, file_ptr, data, len);
break;
case BackupFormat::GCP_ENTRY:
parse_gcp_entry(signal, file_ptr, data, len);
break;
case BackupFormat::EMPTY_ENTRY:
// skip
break;
case 0x4e444242: // 'NDBB'
if (check_file_version(signal, ntohl(* (data+2))) == 0)
{
break;
}
default:
parse_error(signal, file_ptr, __LINE__, ntohl(* data));
}
}
} while(0);
if(file_ptr.p->m_bytes_left == 0 && status & File::FILE_EOF)
{
file_ptr.p->m_status &= ~(Uint32)File::RESTORE_THREAD_RUNNING;
/**
* File is finished...
*/
close_file(signal, file_ptr);
return;
}
/**
* We send an immediate signal to continue the restore, at times this
* could lead to burning some extra CPU since we might still wait for
* input from the disk reading. This code is however only executed
* as part of restarts, so it should be ok to spend some extra CPU
* to ensure that restarts are quick.
*/
signal->theData[0] = RestoreContinueB::RESTORE_NEXT;
signal->theData[1] = file_ptr.i;
sendSignal(reference(), GSN_CONTINUEB, signal, 2, JBB);
}