Pool Allocator

#import "std/pool"

Pool allocator is simple growing allocator grouping all allocated memory into memory blocks of POOL_DEFAULT_SIZE bytes by default.

Supported Operations

- [x] Allocate
- [-] Reallocate (Always allocates and copy data into a new block.)
- [-] Free (Keeps memory for later use.)
- [x] Release
- [x] Reset

• In case there is no space left in the current block new one is allocated.
• Allocated data remains valid until the reset or release is called.
• If required allocation size is greater then the current block size, the new block is allocated with size N * current_block_size where N is the minimum multiplier needed to store the required data size.
• The pool allocator never frees data when free is called, you should call reset instead when all previously allocated data can be freed.
• All preallocated blocks are kept (even after the reset is called) for later use.

std.POOL_DEFAULT_SIZE

POOL_DEFAULT_SIZE : usize : 65536

File: pool.bl

std.PoolAllocator

PoolAllocator :: struct {
    block_size: usize;
    allocator: *Allocator;
    used_blocks: [..]*u8;
    unused_blocks: [..]*u8;
    obsolete_blocks: [..]*u8;
    current_block: *u8;
    top: *u8;
    space: usize;
 }

Pool allocator type.

Members

• block_size - Size of the current block.
• allocator - Base allocator used to allocate block memory.

File: pool.bl

std.pool_default

pool_default :: 

Default pool allocator instance using the current allocator in application context and POOL_DEFAULT_SIZE.

File: pool.bl

std.pool_make

pool_make :: fn (allocator : *Allocator: , block_size :: ) PoolAllocator #inline

Make new pool allocator instance. The allocator is the allocator used internally to allocate block memory. The block_size is size of each preallocated block in Bytes (note that the block size can grow over time when bigger continuous memory allocations are required).

File: pool.bl

std.pool_release

pool_release :: fn (pool: *PoolAllocator) 

Release all allocated memory used by pool (allocated in pool.allocator).

File: pool.bl

std.pool_reset

pool_reset :: fn (pool: *PoolAllocator)  #inline

Invalidate all allocations but keep preallocated memory block for later use.

File: pool.bl