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Man Pages
PTHREAD_SUSPEND_ALL_NP(3) FreeBSD Library Functions Manual PTHREAD_SUSPEND_ALL_NP(3)

pthread_suspend_all_np
suspend all active threads

POSIX Threads Library (libpthread, -lpthread)

#include <pthread_np.h>

void
pthread_suspend_all_np(void);

The pthread_suspend_all_np() function causes all active threads to be suspended. The only exception is the current thread, the thread that called the pthread_suspend_all_np() function.

It is not safe for the caller of the pthread_suspend_all_np() function to use any non-async signal safe functions, besides pthread_resume_all_np(3), until threads are resumed, unless measures are taken to ensure that all threads are suspended at safe points.

pthread_np(3), pthread_resume_all_np(3), pthread_resume_np(3), pthread_suspend_np(3)

This manual page was written by Alexey Zelkin <phantom@FreeBSD.org>.
October 12, 2021 FreeBSD 13.1-RELEASE

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