𝐀 𝐒𝐡𝐨𝐫𝐭 𝐰𝐫𝐢𝐭𝐞 𝐮𝐩 𝐨𝐧 𝐩𝐭𝐡𝐫𝐞𝐚𝐝 𝐟𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐬

In Linux, multithreaded programming involves the use of threads, and the pthread library provides essential functions for creating, managing, and terminating threads. Threads enable concurrent execution, allowing for efficient utilization of system resources and enhanced program performance. The creation, deletion and management of threads are done by the functions present in the pthread library. Here’s a list of few basic pthread library calls.

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐜𝐫𝐞𝐚𝐭𝐞() – Used to create a new thread.
Synatax: int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
void *(*start_routine) (void *), void *arg);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐞𝐱𝐢𝐭()- Called by a thread to exit and return a value to the calling thread.
Syntax: void pthread_exit(void *retval);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐬𝐞𝐥𝐟()- Returns the thread ID of the calling thread. Used within a thread to obtain its own thread ID.
Syntax: pthread_t pthread_self(void);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐣𝐨𝐢𝐧()- Used to wait for a thread to terminate. Blocks the subroutine until the thread specified in the call terminates.
Syntax: int pthread_join(pthread_t thread, void **retval);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐝𝐞𝐭𝐚𝐜𝐡() – Detaches a thread and the resources allocated within a thread are released automatically when the thread exits.
Syntax: int pthread_detach(pthread_t thread);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐦𝐮𝐭𝐞𝐱_𝐢𝐧𝐢𝐭() – Initializes a mutex for thread synchronization.
Syntax:   int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐦𝐮𝐭𝐞𝐱_𝐝𝐞𝐬𝐭𝐫𝐨𝐲()- Destroys a mutex and releases the associated resources
Syntax: int pthread_mutex_destroy(pthread_mutex_t *mutex);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐦𝐮𝐭𝐞𝐱_𝐥𝐨𝐜𝐤() – Locks a mutex, and makes other threads trying to lock it to block until the current thread releases the resource and makes it available.
Syntax: int pthread_mutex_lock(pthread_mutex_t *mutex);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐦𝐮𝐭𝐞𝐱_𝐭𝐫𝐲𝐥𝐨𝐜𝐤() – Tries to lock a mutex but reurns immediately if the mutex is currently locked by another thread.
Syntax: int pthread_mutex_trylock(pthread_mutex_t *mutex);

𝐩𝐭𝐡𝐫𝐞𝐚𝐝_𝐦𝐮𝐭𝐞𝐱_𝐮𝐧𝐥𝐨𝐜𝐤()- Unlocks the previously locked thread. The lock and unlock are used as wrapper functions.
Syntax: int pthread_mutex_unlock(pthread_mutex_t *mutex);

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An Article by: Yashwanth Naidu Tikkisetty
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