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.
SEE ALSO
_lwp_makecontext(3)
HISTORY
The
_lwp_getprivate() and
_lwp_setprivate()
system calls first appeared in
NetBSD 2.0.