- remove all inline assembly versions
- implement the atomic operations using either GCC intrinsics, the
Windows interlocked API or a mutex-based fallback
- drop gatomic-gcc.c since these are now defined in the header file.
Adjust Makefile.am accordingly.
- expand the set of operations: support 'get', 'set', 'compare and
exchange', 'add', 'or', and 'xor' for both integers and pointers
- deprecate g_atomic_int_exchange_and_add since g_atomic_int_add (as
with all the new arithmetic operations) now returns the prior value
- unify the use of macros: all functions are now wrapped in macros that
perform the proper casts and checks
- remove G_GNUC_MAY_ALIAS use; it was never required for the integer
operations (since casting between pointers that only vary in
signedness of the target is explicitly permitted) and we avoid the
need for the pointer operations by using simple 'void *' instead of
'gpointer *' (which caused the 'type-punned pointer' warning)
- provide function implementations of g_atomic_int_inc and
g_atomic_int_dec_and_test: these were strictly macros before
- improve the documentation to make it very clear exactly which types
of pointers these operations may be used with
- remove a few uses of the now-deprecated g_atomic_int_exchange_and_add
- drop initialisation of gatomic from gthread (by using a GStaticMutex
instead of a GMutex)
- update glib.symbols and documentation sections files
Closes#650823 and #650935
When using gcc builtins for atomic operations, provide them
as macros, so gcc can see the builtins and do optimizations.
This change gives considerable speedups in bitlocks, which
use atomic operations heavily, see bug 650458.
Also, don't define G_ATOMIC_OP_MEMORY_BARRIER_NEEDED unconditionally
when using gcc builtins.
https://bugzilla.gnome.org/show_bug.cgi?id=617491
GLib users buildable with gcc 4.4. Patch by Jakub Jelinek.
* glib/gatomic.[hc]: Add G_GNUC_MAY_ALIAS to pointer arguments,
fix macro versions to only operate on objects of the same size.
* glib/gdataset.c:
* glib/gthread.[hc]:
* glib/gdatasetprivate.h: Remove unnecessary casts in
g_atomic_pointer_get calls.
svn path=/trunk/; revision=7875
2008-05-05 Michael Natterer <mitch@imendio.com>
* glib/glib.h: #define __GLIB_H_INSIDE__ around including
everything.
* glib/*.h: check for that define instead of __G_LIB_H__ if
G_DISABLE_SINGLE_INCLUDES is defined.
* glib/gdatasetprivate.h: #include <glib.h> instead of
<glib/gdataset.h>
svn path=/trunk/; revision=6875
2008-03-14 Michael Natterer <mitch@imendio.com>
* glib/*.h: make it possible to disable single-file includes by
defining G_DISABLE_SINGLE_INCLUDES when building against GLib.
Approved by Tim Janik.
* glib/glib.h: include <glib/gslice.h>.
* glib/gi18n.h
* glib/gi18n-lib.h
* glib/gprintf.h: include <glib.h> so the above works when these
files are included without including <glib.h> first.
svn path=/trunk/; revision=6713
Tue Dec 13 10:13:32 2005 Tim Janik <timj@imendio.com>
* glib/gatomic.h: added g_atomic_pointer_set() and g_atomic_int_set()
for systems where the initialization of atomic variables requires a
write memory barrier.
2005-08-04 Matthias Clasen <mclasen@redhat.com>
* glib/glib.symbols:
* glib/gatomic.[hc]: Always export g_atomic_int_get and
g_atomic_pointer_get as functions, even if we have macros,
to avoid changing the ABI depending on configuration.
* glib/gatomic.c: Fix the s390 implementations of
g_atomic_pointer_compare_and_exchange.
2004-02-29 Sebastian Wilhelmi <seppi@seppi.de>
* configure.in, glib/gatomic.c, glib/gatomic.h: Moved the
assembler functions from gatomic.h to gatomic.c, which makes for
better maintainability. Also use gint instead of gint32 to be able
to use reference counting for ABI-fixed structures with
gint/guint.
* glib/gthread.h: Adapted accordingly.
* tests/atomic-test.c: Updated to test for G_MAXINT and G_MININT.
2004-02-26 Sebastian Wilhelmi <seppi@seppi.de>
* glib/gatomic.h: empty G_ATOMIC_MEMORY_BARRIER() definition for
!G_THREADS_ENABLED
* glib/gthread.h: Define g_once and
g_static_mutex_get_mutex_impl_shortcut in terms of
G_MEMORY_BARRIER, if defined and if we can inline.
* configure.in: Remove double checked locking feature check.
2004-02-26 Sebastian Wilhelmi <seppi@seppi.de>
* glib/gatomic.c, glib/gatomic.h: New files to implement atomic
operations for different platforms. Fixes bug #63621.
* glib/glib.h: Include gatomic.h.
* configure.in: Add test for assembler routines for atomic operations.
* glib/Makefile.am: Add gatomic.c, gatomic.h.
* tests/Makefile.am, tests/atomic-test.c: Unit test for atomic
operations.
* glib/glib-overrides.txt, glib/glib-sections.txt,
glib/glib-docs.sgml, glib/tmpl/atomic_operations.sgml: Add docs
for atomic operations.
