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MallocProject
Commit f50581e6 authored by Shivaji's avatar Shivaji
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added overwrite in mm2

parent 5d3439c4
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Showing with 12 additions and 12 deletions
mm2.c
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...@@ -692,8 +692,8 @@ void merge_free_blocks(block_meta_data_t *first,block_meta_data_t *second) ...@@ -692,8 +692,8 @@ void merge_free_blocks(block_meta_data_t *first,block_meta_data_t *second)
void create_new_block_and_insert_into_freelist(block_meta_data_t *meta_data_block,block_meta_data_t *free_block,uint32_t final_remain,int c) void create_new_block_and_insert_into_freelist(block_meta_data_t *meta_data_block,block_meta_data_t *free_block,uint32_t final_remain,int c)
{ {
// block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block); block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block);
// end_meta_data_block->block_size = meta_data_block->block_size; end_meta_data_block->block_size = meta_data_block->block_size;
block_meta_data_t *new_block = (block_meta_data_t *)NEXT_META_BLOCK_BY_SIZE(meta_data_block); block_meta_data_t *new_block = (block_meta_data_t *)NEXT_META_BLOCK_BY_SIZE(meta_data_block);
if(meta_data_block->is_free == MM_TRUE) if(meta_data_block->is_free == MM_TRUE)
meta_data_block->is_free = MM_FALSE; meta_data_block->is_free = MM_FALSE;
...@@ -708,10 +708,10 @@ void create_new_block_and_insert_into_freelist(block_meta_data_t *meta_data_bloc ...@@ -708,10 +708,10 @@ void create_new_block_and_insert_into_freelist(block_meta_data_t *meta_data_bloc
assert(meta_data_block->next_block->block_size == new_block->block_size); assert(meta_data_block->next_block->block_size == new_block->block_size);
block_end_meta_data_t *new_end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(new_block); block_end_meta_data_t *new_end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(new_block);
new_end_meta_data_block->block_size = new_block->block_size; new_end_meta_data_block->block_size = new_block->block_size;
// if(new_block->next_block && new_block->next_block->is_free == MM_TRUE) if(new_block->next_block && new_block->next_block->is_free == MM_TRUE)
// merge_free_blocks(new_block, new_block->next_block); merge_free_blocks(new_block, new_block->next_block);
// if(new_block->prev_block && new_block->prev_block->is_free == MM_TRUE) if(new_block->prev_block && new_block->prev_block->is_free == MM_TRUE)
// merge_free_blocks(new_block, new_block->prev_block); merge_free_blocks(new_block, new_block->prev_block);
insert_node_in_freelist(root,new_block); insert_node_in_freelist(root,new_block);
} }
...@@ -1080,8 +1080,8 @@ void *mm_realloc(void *ptr, size_t size) ...@@ -1080,8 +1080,8 @@ void *mm_realloc(void *ptr, size_t size)
uint32_t final_remain = abs(TOTAL_COMBINE_SIZE_OF_BLOCKS(meta_data_block->prev_block) - req_rem_size); uint32_t final_remain = abs(TOTAL_COMBINE_SIZE_OF_BLOCKS(meta_data_block->prev_block) - req_rem_size);
memcpy((char *)(meta_data_block->prev_block)+ALIGN(sizeof(block_meta_data_t)), (char *)(meta_data_block)+ALIGN(sizeof(block_meta_data_t)),meta_data_block->block_size); memcpy((char *)(meta_data_block->prev_block)+ALIGN(sizeof(block_meta_data_t)), (char *)(meta_data_block)+ALIGN(sizeof(block_meta_data_t)),meta_data_block->block_size);
block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block); block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block);
end_meta_data_block->block_size = meta_data_block->block_size; // end_meta_data_block->block_size = meta_data_block->block_size;
meta_data_block = meta_data_block->prev_block; // meta_data_block = meta_data_block->prev_block;
create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,1); create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,1);
return (void *)((char *)meta_data_block+ALIGN(sizeof(block_meta_data_t))); return (void *)((char *)meta_data_block+ALIGN(sizeof(block_meta_data_t)));
} }
...@@ -1097,8 +1097,8 @@ void *mm_realloc(void *ptr, size_t size) ...@@ -1097,8 +1097,8 @@ void *mm_realloc(void *ptr, size_t size)
+(uint32_t)ALIGN(sizeof(block_meta_data_t)) - req_rem_size); +(uint32_t)ALIGN(sizeof(block_meta_data_t)) - req_rem_size);
memcpy((char *)(meta_data_block->prev_block)+ALIGN(sizeof(block_meta_data_t)), (char *)(meta_data_block)+ALIGN(sizeof(block_meta_data_t)),meta_data_block->block_size); memcpy((char *)(meta_data_block->prev_block)+ALIGN(sizeof(block_meta_data_t)), (char *)(meta_data_block)+ALIGN(sizeof(block_meta_data_t)),meta_data_block->block_size);
block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block); // block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block);
end_meta_data_block->block_size = meta_data_block->block_size; // end_meta_data_block->block_size = meta_data_block->block_size;
meta_data_block = meta_data_block->prev_block; meta_data_block = meta_data_block->prev_block;
create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,0); create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,0);
return (void *)((char *)meta_data_block+ALIGN(sizeof(block_meta_data_t))); return (void *)((char *)meta_data_block+ALIGN(sizeof(block_meta_data_t)));
...@@ -1111,8 +1111,8 @@ void *mm_realloc(void *ptr, size_t size) ...@@ -1111,8 +1111,8 @@ void *mm_realloc(void *ptr, size_t size)
req_rem_size -= inter_frag; req_rem_size -= inter_frag;
uint32_t final_remain = TOTAL_COMBINE_SIZE_OF_BLOCKS(meta_data_block->next_block) - req_rem_size; uint32_t final_remain = TOTAL_COMBINE_SIZE_OF_BLOCKS(meta_data_block->next_block) - req_rem_size;
meta_data_block->block_size = size; meta_data_block->block_size = size;
block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block); // block_end_meta_data_t *end_meta_data_block = (block_end_meta_data_t *)end_meta_data_addr(meta_data_block);
end_meta_data_block->block_size = meta_data_block->block_size; // end_meta_data_block->block_size = meta_data_block->block_size;
create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,1); create_new_block_and_insert_into_freelist(meta_data_block,meta_data_block->next_block,final_remain,1);
return (void *)(meta_data_block+1); return (void *)(meta_data_block+1);
} }
......
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