fdo-mirrors/cairo
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/cairo/cairo.git synced 2026-05-27 18:38:16 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

[atomic] Silence compiler warnings by defining an intptr_t

Browse source 
Evaulate the integer sizes during configure to find one of the exact same
size as a void* to use in the conversion of the atomic ptr cmpxchg to an
atomic int cmpxchg.
This commit is contained in:
Chris Wilson 2009-06-21 22:25:08 +01:00
parent a2d4fb5009
commit b82e7740c1
2 changed files with 15 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
build/configure.ac.system
View file

@ -11,6 +11,9 @@ CAIRO_BIGENDIAN
CAIRO_CHECK_NATIVE_ATOMIC_PRIMITIVES
CAIRO_CHECK_ATOMIC_OP_NEEDS_MEMORY_BARRIER
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(size_t)
AC_MSG_CHECKING([for native Win32])

19
src/cairo-atomic-private.h
View file

@ -55,14 +55,19 @@ typedef int cairo_atomic_int_t;
# define _cairo_atomic_int_dec_and_test(x) (__sync_fetch_and_add(x, -1) == 1)
# define _cairo_atomic_int_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (x, oldv, newv)
#if SIZEOF_VOID_P==SIZEOF_INT
typedef int cairo_atomic_intptr_t;
#elif SIZEOF_VOID_P==SIZEOF_LONG
typedef long cairo_atomic_intptr_t;
#elif SIZEOF_VOID_P==SIZEOF_LONG_LONG
typedef long long cairo_atomic_intptr_t;
#else
#error No matching integer pointer type
#endif
# define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \
(sizeof(void*) == sizeof(int) ?\
(void*)__sync_val_compare_and_swap ((int*)x, (int)oldv, (int)newv) :\
sizeof(void*) == sizeof(long) ?\
(void*)__sync_val_compare_and_swap ((long*)x, (long)oldv, (long)newv) :\
sizeof(void*) == sizeof(long long) ?\
(void*)__sync_val_compare_and_swap ((long long*)x, (long long)oldv, (long long)newv) :\
(void*)(oldv)/*impossible*/)
(void*)__sync_val_compare_and_swap ((cairo_atomic_intptr_t*)x, (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv)
#endif