PTHREAD_CLEANUP(3)

PTHREAD_CLEANUP(3) | Library Functions Manual | PTHREAD_CLEANUP(3)

# NAME

pthread_cleanup_push, pthread_cleanup_pop — add and remove cleanup functions for thread exit

# LIBRARY

POSIX Threads Library (libpthread, -lpthread)

# SYNOPSIS

#include <pthread.h>
void
pthread_cleanup_push(void (*cleanup_routine)(void *), void *arg);
void
pthread_cleanup_pop(int execute);

# DESCRIPTION

The pthread_cleanup_push() function adds cleanup_routine to the top of the stack of cleanup handlers that get called when the current thread exits.
The pthread_cleanup_pop() function pops the top cleanup routine off of the current threads cleanup routine stack, and, if execute is non-zero, it will execute the function.
When cleanup_routine is called, it is passed arg as its only argument.
These functions may be implemented as macros which contain scope delimiters; therefore, there must be a matching pthread_cleanup_pop() for every pthread_cleanup_push() at the same level of lexical scoping.
The effect of calling longjmp() or siglongjmp() is undefined after a call to pthread_cleanup_push() but before the matching call to pthread_cleanup_pop() after the jump buffer was filled.

# RETURN VALUES

Neither pthread_cleanup_push() nor pthread_cleanup_pop() returns a value.

# ERRORS

None.

# SEE ALSO

pthread_exit(3)

# STANDARDS

Both functions conform to IEEE Std 1003.1-2001 (“POSIX.1”).

July 9, 2010 | NetBSD 8.3