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pthread_kill_other_threads_np(3) [debian man page]

PTHREAD_KILL_OTHER_THREADS_NP(3)			     Linux Programmer's Manual				  PTHREAD_KILL_OTHER_THREADS_NP(3)

NAME
pthread_kill_other_threads_np - terminate all other threads in process SYNOPSIS
#include <pthread.h> void pthread_kill_other_threads_np(void); DESCRIPTION
pthread_kill_other_threads_np() only has an effect in the LinuxThreads threading implementation. On that implementation, calling this function causes the immediate termination of all threads in the application, except the calling thread. The cancellation state and cancel- lation type of the to-be-terminated threads are ignored, and the cleanup handlers are not called in those threads. CONFORMING TO
This function is a nonstandard GNU extension; hence the suffix "_np" (nonportable) in the name. NOTES
pthread_kill_other_threads_np() is intended to be called just before a thread calls execve(2) or a similar function. This function is designed to address a limitation in the obsolete LinuxThreads implementation whereby the other threads of an application are not automati- cally terminated (as POSIX.1-2001 requires) during execve(2). In the NPTL threading implementation, pthread_kill_other_threads_np() exists, but does nothing. (Nothing needs to be done, because the implementation does the right thing during an execve(2).) SEE ALSO
execve(2), pthread_cancel(3), pthread_setcancelstate(3), pthread_setcanceltype(3), pthreads(7) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2010-09-09 PTHREAD_KILL_OTHER_THREADS_NP(3)

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PTHREAD_ATTR_SETSCOPE(3)				     Linux Programmer's Manual					  PTHREAD_ATTR_SETSCOPE(3)

NAME
pthread_attr_setscope, pthread_attr_getscope - set/get contention scope attribute in thread attributes object SYNOPSIS
#include <pthread.h> int pthread_attr_setscope(pthread_attr_t *attr, int scope); int pthread_attr_getscope(pthread_attr_t *attr, int *scope); Compile and link with -pthread. DESCRIPTION
The pthread_attr_setscope() function sets the contention scope attribute of the thread attributes object referred to by attr to the value specified in scope. The contention scope attribute defines the set of threads against which a thread competes for resources such as the CPU. POSIX.1-2001 specifies two possible values for scope: PTHREAD_SCOPE_SYSTEM The thread competes for resources with all other threads in all processes on the system that are in the same scheduling allocation domain (a group of one or more processors). PTHREAD_SCOPE_SYSTEM threads are scheduled relative to one another according to their scheduling policy and priority. PTHREAD_SCOPE_PROCESS The thread competes for resources with all other threads in the same process that were also created with the PTHREAD_SCOPE_PROCESS contention scope. PTHREAD_SCOPE_PROCESS threads are scheduled relative to other threads in the process according to their schedul- ing policy and priority. POSIX.1-2001 leaves it unspecified how these threads contend with other threads in other process on the system or with other threads in the same process that were created with the PTHREAD_SCOPE_SYSTEM contention scope. POSIX.1-2001 only requires that an implementation support one of these contention scopes, but permits both to be supported. Linux supports PTHREAD_SCOPE_SYSTEM, but not PTHREAD_SCOPE_PROCESS. The pthread_attr_getscope() function returns the contention scope attribute of the thread attributes object referred to by attr in the buf- fer pointed to by scope. RETURN VALUE
On success, these functions return 0; on error, they return a nonzero error number. ERRORS
pthread_attr_setscope() can fail with the following errors: EINVAL An invalid value was specified in scope. ENOTSUP scope specified the value PTHREAD_SCOPE_PROCESS, which is not supported on Linux. CONFORMING TO
POSIX.1-2001. NOTES
The PTHREAD_SCOPE_SYSTEM contention scope typically indicates that a userspace thread is bound directly to a single kernel-scheduling entity. This is the case on Linux for the obsolete LinuxThreads implementation and the modern NPTL implementation, which are both 1:1 threading implementations. POSIX.1-2001 specifies that the default contention scope is implementation-defined. SEE ALSO
pthread_attr_init(3), pthread_attr_setaffinity_np(3), pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3), pthread_attr_setschedpolicy(3), pthread_create(3), pthreads(7) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2008-10-24 PTHREAD_ATTR_SETSCOPE(3)

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