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Windows: clarify and rename oio_atomic_exchange_set

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This commit is contained in:
Bert Belder 2011-05-09 16:57:39 +02:00
parent 820c942e3a
commit 8b09c88f1f
1 changed files with 10 additions and 7 deletions
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17
oio-win.c
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@ -201,24 +201,27 @@ static char oio_zero_[] = "";
/* Atomic set operation on char */
#ifdef _MSC_VER /* MSVC */
/* Supported by MSVC on x32 and x64 */
/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is slightly less */
/* efficient than InterlockedExchange, but InterlockedExchange8 does not */
/* exist, and interlocked operations on larger targets might require the */
/* target to be aligned. */
#pragma intrinsic(_InterlockedOr8)
char __declspec(inline) AtomicExchangeSet(char volatile* target) {
static char __declspec(inline) oio_atomic_exchange_set(char volatile* target) {
return _InterlockedOr8(target, 1);
}
#else /* GCC */
/* Mingw-32 version, hopefully this works for 64-bit gcc as well. */
inline char AtomicExchangeSet(char volatile* target) {
static inline char oio_atomic_exchange_set(char volatile* target) {
const char one = 1;
char result;
char old_value;
__asm__ __volatile__ ("lock xchgb %0, %1\n\t"
: "=r"(result), "=m"(*target)
: "=r"(old_value), "=m"(*target)
: "0"(one), "m"(*target)
: "memory");
return result;
return old_value;
}
#endif
@ -1200,7 +1203,7 @@ int oio_async_send(oio_handle_t* handle) {
/* or closed handle. */
assert(!(handle->flags & OIO_HANDLE_CLOSING));
if (!AtomicExchangeSet(&handle->async_sent)) {
if (!oio_atomic_exchange_set(&handle->async_sent)) {
if (!PostQueuedCompletionStatus(oio_iocp_,
0,
0,