PTHREAD_MULTI_NP(3) BSD Library Functions Manual PTHREAD_MULTI_NP(3)NAME
pthread_multi_np, pthread_single_np -- switch between multi- and single-threaded scheduling modes
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread_np.h>
int
pthread_multi_np(void);
int
pthread_single_np(void);
DESCRIPTION
The pthread_single_np() function switches the process to a single-threaded mode, i.e., suspends all threads except the current. The seman-
tics of this function is similar to pthread_suspend_all_np(3).
The pthread_multi_np() function switches the process to a multi-threaded mode. The semantics of this function is similar to
pthread_resume_all_np(3).
RETURN VALUES
The pthread_multi_np() and pthread_single_np functions always return 0.
SEE ALSO pthread_resume_all_np(3), pthread_suspend_all_np(3)AUTHORS
This manual page was written by Alexey Zelkin <phantom@FreeBSD.org>.
BSD February 13, 2003 BSD
Check Out this Related Man Page
PTHREAD_ATTR_GET_NP(3) BSD Library Functions Manual PTHREAD_ATTR_GET_NP(3)NAME
pthread_attr_get_np -- get attributes of existent thread
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread_np.h>
int
pthread_attr_get_np(pthread_t pid, pthread_attr_t *dst);
DESCRIPTION
The pthread_attr_get_np() function is used to get existent thread's attributes. Most fields of pthread_attr_t structure are exact values of
attributes provided at thread creation time (as parameter to pthread_create(3) function), except for the stack address.
Value returned as dst is supposed to be used in conjunction with pthread_attr_get*() functions to retrieve individual values from
pthread_attr_t structure. Parameter dst should point to allocated memory area big enough to fit this structure.
It is HIGHLY RECOMMENDED to use pthread_attr_init(3) function to allocate attribute storage.
IMPLEMENTATION NOTES
The pthread_attr_get_np() function will always return a pointer to the thread's real stack address, regardless of its value in the original
attributes structure.
RETURN VALUES
If successful, pthread_attr_get_np() function returns 0. Otherwise, an error number is returned to indicate the error.
EXAMPLES
size_t
my_thread_stack_size(pthread_t pid)
{
pthread_attr_t attr;
size_t size;
pthread_attr_init(&attr);
pthread_attr_get_np(pid, &attr);
pthread_attr_getstacksize(&attr, &size);
pthread_attr_destroy(&attr);
return(size);
}
ERRORS
The pthread_attr_get_np() function will fail if:
[EINVAL] Invalid value for one of given parameters.
[ESRC] No thread could be found corresponding to that specified by the given thread ID.
SEE ALSO pthread_attr_destroy(3), pthread_attr_getdetachstate(3), pthread_attr_getinheritsched(3), pthread_attr_getschedparam(3),
pthread_attr_getschedpolicy(3), pthread_attr_getscope(3), pthread_attr_getstack(3), pthread_attr_getstackaddr(3),
pthread_attr_getstacksize(3), pthread_attr_init(3)AUTHORS
The pthread_attr_get_np() function and this manual page were written by Alexey Zelkin <phantom@FreeBSD.org>.
BSD January 31, 2003 BSD
hey everyone,
I'm having some trouble breaking down some code. It's simple a control script that takes machines meant to be backed up from a list. Then according to that will run multi-threaded processes up until the specified thread limit.
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Hi All,
We have a multi-threaded application.
During the course of action, each process creates some files. Is there any way to know which process has created a particular file ?
Ex:
Suppose we have 3 process running A, B and C in the application and some files FILE1 FILE2 FILE3 and... (4 Replies)