_LWP_GETPRIVATE(2) |
System Calls Manual |
_LWP_GETPRIVATE(2) |
NAME
_lwp_getprivate, _lwp_setprivate — get and set light-weight process private data
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <lwp.h>
void *
_lwp_getprivate(void);
void
_lwp_setprivate(void *ptr);
DESCRIPTION
_lwp_setprivate() stores the pointer to private data
ptr in a location private to the LWP.
_lwp_getprivate() returns the pointer to private data for the LWP.
Some platforms provide alternative ways quicker than _lwp_getprivate() to use the pointer.
-
alpha
-
The pointer can be retrieved by call_pal PAL_rdunique.
-
amd64
-
The base address of %fs register is set to the pointer so that the private data can be accessed using the selector.
-
i386
-
The base address of %gs register is set to the pointer so that the private data can be accessed using the selector.
-
sparc
-
%g7 register is set to the pointer.
ERRORS
The _lwp_getprivate() and _lwp_setprivate() functions are always successful, and no return value is reserved to indicate an error.
HISTORY
The _lwp_getprivate() and _lwp_setprivate() system calls first appeared in NetBSD 2.0.