pool.c File Reference

#include "zstd_deps.h"
#include "debug.h"
#include "zstd_internal.h"
#include "pool.h"

Data Structures
struct	POOL_ctx_s

Functions
POOL_ctx *	POOL_create (size_t numThreads, size_t queueSize)
POOL_ctx *	POOL_create_advanced (size_t numThreads, size_t queueSize, ZSTD_customMem customMem)
void	POOL_free (POOL_ctx *ctx)
int	POOL_resize (POOL_ctx *ctx, size_t numThreads)
void	POOL_add (POOL_ctx *ctx, POOL_function function, void *opaque)
int	POOL_tryAdd (POOL_ctx *ctx, POOL_function function, void *opaque)
size_t	POOL_sizeof (const POOL_ctx *ctx)

Function Documentation

POOL_add()

void POOL_add	(	POOL_ctx *	ctx,
		POOL_function	function,
		void *	opaque )

POOL_add() : Add the job function(opaque) to the thread pool. ctx must be valid. Possibly blocks until there is room in the queue. Note : The function may be executed asynchronously, therefore, opaque must live until function has been completed.

POOL_create()

POOL_ctx * POOL_create	(	size_t	numThreads,
		size_t	queueSize )

POOL_create() : Create a thread pool with at most numThreads threads. numThreads must be at least 1. The maximum number of queued jobs before blocking is queueSize.

Returns

: POOL_ctx pointer on success, else NULL.

POOL_create_advanced()

POOL_ctx * POOL_create_advanced	(	size_t	numThreads,
		size_t	queueSize,
		ZSTD_customMem	customMem )

POOL_free()

void POOL_free

(

POOL_ctx *

ctx

)

POOL_free() : Free a thread pool returned by POOL_create().

POOL_resize()

int POOL_resize	(	POOL_ctx *	ctx,
		size_t	numThreads )

POOL_resize() : Expands or shrinks pool's number of threads. This is more efficient than releasing + creating a new context, since it tries to preserve and re-use existing threads. numThreads must be at least 1.

Returns

: 0 when resize was successful, !0 (typically 1) if there is an error. note : only numThreads can be resized, queueSize remains unchanged.

POOL_sizeof()

size_t POOL_sizeof

(

const POOL_ctx *

ctx

)

POOL_sizeof() :

Returns

threadpool memory usage note : compatible with NULL (returns 0 in this case)

POOL_tryAdd()

int POOL_tryAdd	(	POOL_ctx *	ctx,
		POOL_function	function,
		void *	opaque )

POOL_tryAdd() : Add the job function(opaque) to thread pool if a queue slot is available. Returns immediately even if not (does not block).

Returns

: 1 if successful, 0 if not.