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unix: fix GNU-ism introduced in edd1007

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Don't use features.h, it's only available on GNU/glibc systems.
This commit is contained in:
Ben Noordhuis 2013-01-07 15:42:28 +01:00
parent f24335d498
commit cb3c448d8f
1 changed files with 1 additions and 2 deletions
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3
src/unix/async.c
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@ -25,7 +25,6 @@
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <features.h>
static int uv__async_init(uv_loop_t* loop);
static void uv__async_io(uv_loop_t* loop, uv__io_t* w, unsigned int events);
@ -51,7 +50,7 @@ static int uv__async_make_pending(volatile sig_atomic_t* ptr) {
__asm__ __volatile__("xchgl %0, %1" : "+r" (val) : "m" (*ptr));
return val != 0;
}
#elif defined(__GNUC_PREREQ) && __GNUC_PREREQ(4, 1)
#elif defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 0)
return __sync_val_compare_and_swap(ptr, 0, 1) != 0;
#else
*ptr = 1;