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changed get_cached_block() to no longer use a reference argument 

modified to panic when an invalid block is requested (to find fs errors)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16537 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2006-02-27 18:03:42 +00:00
parent 9b5a183539
commit 89d76e508d
1 changed files with 16 additions and 7 deletions
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23
src/system/kernel/cache/block_cache.cpp vendored
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@ -489,6 +489,9 @@ put_cached_block(block_cache *cache, cached_block *block)
static void
put_cached_block(block_cache *cache, off_t blockNumber)
{
if (blockNumber < 0 || blockNumber >= cache->max_blocks)
panic("put_cached_block: invalid block number %lld (max %lld)", blockNumber, cache->max_blocks - 1);
cached_block *block = (cached_block *)hash_lookup(cache->hash, &blockNumber);
if (block != NULL)
put_cached_block(cache, block);
@ -496,10 +499,13 @@ put_cached_block(block_cache *cache, off_t blockNumber)
static cached_block *
get_cached_block(block_cache *cache, off_t blockNumber, bool &allocated, bool readBlock = true)
get_cached_block(block_cache *cache, off_t blockNumber, bool *allocated, bool readBlock = true)
{
if (blockNumber < 0 || blockNumber >= cache->max_blocks)
panic("get_cached_block: invalid block number %lld (max %lld)", blockNumber, cache->max_blocks - 1);
cached_block *block = (cached_block *)hash_lookup(cache->hash, &blockNumber);
allocated = false;
*allocated = false;
if (block == NULL) {
// read block into cache
@ -507,7 +513,7 @@ get_cached_block(block_cache *cache, off_t blockNumber, bool &allocated, bool re
if (block == NULL)
return NULL;
allocated = true;
*allocated = true;
} else {
/*
if (block->ref_count == 0 && block->current_data != NULL) {
@ -521,12 +527,12 @@ get_cached_block(block_cache *cache, off_t blockNumber, bool &allocated, bool re
if (block->current_data == NULL)
return NULL;
allocated = true;
*allocated = true;
}
*/
}
if (allocated && readBlock) {
if (*allocated && readBlock) {
int32 blockSize = cache->block_size;
if (read_pos(cache->fd, blockNumber * blockSize, block->current_data, blockSize) < blockSize) {
@ -562,8 +568,11 @@ get_writable_cached_block(block_cache *cache, off_t blockNumber, off_t base, off
{
TRACE(("get_writable_cached_block(blockNumber = %Ld, transaction = %ld)\n", blockNumber, transactionID));
if (blockNumber < 0 || blockNumber >= cache->max_blocks)
panic("get_writable_cached_block: invalid block number %lld (max %lld)", blockNumber, cache->max_blocks - 1);
bool allocated;
cached_block *block = get_cached_block(cache, blockNumber, allocated, !cleared);
cached_block *block = get_cached_block(cache, blockNumber, &allocated, !cleared);
if (block == NULL)
return NULL;
@ -1205,7 +1214,7 @@ block_cache_get_etc(void *_cache, off_t blockNumber, off_t base, off_t length)
BenaphoreLocker locker(&cache->lock);
bool allocated;
cached_block *block = get_cached_block(cache, blockNumber, allocated);
cached_block *block = get_cached_block(cache, blockNumber, &allocated);
if (block == NULL)
return NULL;