thread_pool.h File Reference

Thread pool functions. More...

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>

Data Structures
struct	ThreadPoolTask
	Thread pool task structure. More...

Typedefs
typedef uint8_t	TaskOrder
	Task order type.
typedef struct ThreadPool_T	ThreadPool_T
	Thread pool structure.
typedef ThreadPool_T *	ThreadPool
	Thread pool instance.

Enumerations
enum	TaskOrder_T { STACK_TASK_ORDER = 0 , QUEUE_TASK_ORDER = 1 , TASK_ORDER_COUNT = 2 }
	Task order types.

Functions
ThreadPool	createThreadPool (size_t threadCount, size_t taskCapacity, TaskOrder taskOrder)
	Creates a new thread pool instance.
void	destroyThreadPool (ThreadPool threadPool)
	Destroys thread pool instance. (Blocking)
size_t	getThreadPoolThreadCount (ThreadPool threadPool)
	Returns thread pool thread count.
size_t	getThreadPoolTaskCapacity (ThreadPool threadPool)
	Returns thread pool task capacity.
bool	isThreadPoolRunning (ThreadPool threadPool)
	Returns true if any thread is running task.
TaskOrder	getThreadPoolTaskOrder (ThreadPool threadPool)
	Returns thread pool task order type.
void	setThreadPoolTaskOrder (ThreadPool threadPool, TaskOrder taskOrder)
	Sets thread pool task order type. (Blocking)
bool	resizeThreadPoolTasks (ThreadPool threadPool, size_t taskCapacity)
	Resize thread pool task buffer. (Blocking)
bool	tryAddThreadPoolTask (ThreadPool threadPool, ThreadPoolTask task)
	Adds a new task to the thread pool, if enough space.
void	addThreadPoolTask (ThreadPool threadPool, ThreadPoolTask task)
	Adds a new task to the thread pool. (Blocking)
void	addThreadPoolTasks (ThreadPool threadPool, ThreadPoolTask *tasks, size_t taskCount)
	Adds a new tasks to the thread pool. (Blocking)
void	addThreadPoolTaskNumber (ThreadPool threadPool, ThreadPoolTask task, size_t taskCount)
	Adds a new tasks to the thread pool. (Blocking)
void	waitThreadPool (ThreadPool threadPool)
	Waits until the thread pool has completed all tasks. (Blocking)

Detailed Description

Thread pool functions.

A thread pool is a programming concept and design pattern used in concurrent programming to efficiently manage and reuse a pool of worker threads. Instead of creating a new thread for each task, a thread pool maintains a fixed number of threads that are created and initialized upfront, ready to execute tasks concurrently. This helps to reduce the overhead associated with creating and destroying threads for every individual task, resulting in better performance and resource utilization.

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Data Structure Documentation

ThreadPoolTask

struct ThreadPoolTask

Thread pool task structure.

Data Fields
void(*)(void *)	function
void *	argument

Function Documentation

createThreadPool()

ThreadPool createThreadPool	(	size_t	threadCount,
		size_t	taskCapacity,
		TaskOrder	taskOrder )

Creates a new thread pool instance.

Note

You should destroy created thread pool instance manually.

Internally it allocates the necessary mutexes, condwars and arrays. It also creates and starts the specified number of threads.

Parameters

threadCount	target thread count in the pool
taskCapacity	task buffer size
taskOrder	task order type

Returns

Thread pool instance on success, otherwise NULL.

destroyThreadPool()

void destroyThreadPool

(

ThreadPool

threadPool

)

Destroys thread pool instance. (Blocking)

Parameters

threadPool

thread pool instance or NULL

getThreadPoolThreadCount()

size_t getThreadPoolThreadCount

(

ThreadPool

threadPool

)

Returns thread pool thread count.

Parameters

threadPool

thread pool instance

getThreadPoolTaskCapacity()

size_t getThreadPoolTaskCapacity

(

ThreadPool

threadPool

)

Returns thread pool task capacity.

Parameters

threadPool

thread pool instance

isThreadPoolRunning()

bool isThreadPoolRunning

(

ThreadPool

threadPool

)

Returns true if any thread is running task.

Parameters

threadPool

thread pool instance

getThreadPoolTaskOrder()

TaskOrder getThreadPoolTaskOrder

(

ThreadPool

threadPool

)

Returns thread pool task order type.

Parameters

threadPool

thread pool instance

setThreadPoolTaskOrder()

void setThreadPoolTaskOrder	(	ThreadPool	threadPool,
		TaskOrder	taskOrder )

Sets thread pool task order type. (Blocking)

Parameters

threadPool	thread pool instance
taskOrder	task order type

resizeThreadPoolTasks()

bool resizeThreadPoolTasks	(	ThreadPool	threadPool,
		size_t	taskCapacity )

Resize thread pool task buffer. (Blocking)

Parameters

threadPool	thread pool instance
taskCapacity	task buffer size

Returns

True on success, otherwise false.

tryAddThreadPoolTask()

bool tryAddThreadPoolTask	(	ThreadPool	threadPool,
		ThreadPoolTask	task )

Adds a new task to the thread pool, if enough space.

Parameters

threadPool	thread pool instance
task	target thread pool task

Returns

True if task successfully added, otherwise false.

addThreadPoolTask()

void addThreadPoolTask	(	ThreadPool	threadPool,
		ThreadPoolTask	task )

Adds a new task to the thread pool. (Blocking)

Parameters

threadPool	thread pool instance
task	target thread pool task

addThreadPoolTasks()

void addThreadPoolTasks	(	ThreadPool	threadPool,
		ThreadPoolTask *	tasks,
		size_t	taskCount )

Adds a new tasks to the thread pool. (Blocking)

Parameters

	threadPool	thread pool instance
[in,out]	tasks	target thread pool tasks
	taskCount	task array size

addThreadPoolTaskNumber()

void addThreadPoolTaskNumber	(	ThreadPool	threadPool,
		ThreadPoolTask	task,
		size_t	taskCount )

Adds a new tasks to the thread pool. (Blocking)

Parameters

threadPool	thread pool instance.
task	target thread pool task.
taskCount	task count

waitThreadPool()

void waitThreadPool

(

ThreadPool

threadPool

)

Waits until the thread pool has completed all tasks. (Blocking)

Parameters

threadPool

thread pool instance.