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Minor block cache refactoring. 

* Extracted a write_blocks_in_previous_transaction() function out of
  cache_end_transaction(), and cache_detach_sub_transaction().
This commit is contained in:
Axel Dörfler 2012-08-27 12:45:23 +02:00
parent dd9d610500
commit 9089ab06bd
1 changed files with 27 additions and 23 deletions
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50
src/system/kernel/cache/block_cache.cpp vendored
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@ -984,6 +984,27 @@ lookup_transaction(block_cache* cache, int32 id)
}
/*! Writes back any changes made to blocks in \a transaction that are still
part of a previous transacton.
*/
static status_t
write_blocks_in_previous_transaction(block_cache* cache,
cache_transaction* transaction)
{
BlockWriter writer(cache);
cached_block* block = transaction->first_block;
for (; block != NULL; block = block->transaction_next) {
if (block->previous_transaction != NULL) {
// need to write back pending changes
writer.Add(block);
}
}
return writer.Write();
}
// #pragma mark - cached_block
@ -2789,17 +2810,7 @@ cache_end_transaction(void* _cache, int32 id,
}
// Write back all pending transaction blocks
BlockWriter writer(cache);
cached_block* block = transaction->first_block;
for (; block != NULL; block = block->transaction_next) {
if (block->previous_transaction != NULL) {
// need to write back pending changes
writer.Add(block);
}
}
status_t status = writer.Write();
status_t status = write_blocks_in_previous_transaction(cache, transaction);
if (status != B_OK)
return status;
@ -2816,7 +2827,8 @@ cache_end_transaction(void* _cache, int32 id,
// iterate through all blocks and free the unchanged original contents
cached_block* next;
for (block = transaction->first_block; block != NULL; block = next) {
for (cached_block* block = transaction->first_block; block != NULL;
block = next) {
next = block->transaction_next;
ASSERT(block->previous_transaction == NULL);
@ -2920,16 +2932,7 @@ cache_detach_sub_transaction(void* _cache, int32 id,
// iterate through all blocks and free the unchanged original contents
BlockWriter writer(cache);
cached_block* block = transaction->first_block;
for (; block != NULL; block = block->transaction_next) {
if (block->previous_transaction != NULL) {
// need to write back pending changes
writer.Add(block);
}
}
status_t status = writer.Write();
status_t status = write_blocks_in_previous_transaction(cache, transaction);
if (status != B_OK)
return status;
@ -2951,7 +2954,8 @@ cache_detach_sub_transaction(void* _cache, int32 id,
cached_block* last = NULL;
cached_block* next;
for (block = transaction->first_block; block != NULL; block = next) {
for (cached_block* block = transaction->first_block; block != NULL;
block = next) {
next = block->transaction_next;
ASSERT(block->previous_transaction == NULL);