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Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics.

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Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier()
Added an atomic test adapted from code by Michael Davidsaver
This commit is contained in:
Sam Lantinga 2011-01-16 15:16:39 -08:00
parent 1bc8fe69ce
commit b0e0f61c7e
8 changed files with 301 additions and 62 deletions
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28
configure.in
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@ -181,7 +181,7 @@ if test x$enable_dependency_tracking = xyes; then
DEPENDENCY_TRACKING_OPTIONS="-MMD -MT \$@"
fi
fi
dnl See whether we are allowed to use the system C library
AC_ARG_ENABLE(libc,
AC_HELP_STRING([--enable-libc], [Use the system C library [[default=yes]]]),
@ -285,6 +285,32 @@ if test x$have_inttypes != xyes; then
AC_DEFINE(uintptr_t, unsigned long)
fi
dnl See whether we can use gcc atomic operations on this architecture
AC_ARG_ENABLE(gcc-atomics,
AC_HELP_STRING([--enable-gcc-atomics],
[Use gcc builtin atomics [[default=yes]]]),
, enable_gcc_atomics=yes)
if test x$enable_gcc_atomics = xyes; then
have_gcc_atomics=no
AC_MSG_CHECKING(for GCC builtin atomic operations)
AC_TRY_LINK([
],[
int a;
void *x, *y, *z;
__sync_lock_test_and_set(&a, 4);
__sync_fetch_and_add(&a, 1);
__sync_bool_compare_and_swap(&a, 5, 10);
__sync_bool_compare_and_swap(&x, y, z);
],[
have_gcc_atomics=yes
])
AC_MSG_RESULT($have_gcc_atomics)
if test x$have_gcc_mmd_mt = xyes; then
AC_DEFINE(HAVE_GCC_ATOMICS)
fi
fi
# Standard C sources
SOURCES="$SOURCES $srcdir/src/*.c"
SOURCES="$SOURCES $srcdir/src/audio/*.c"