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darwin: use new wait on address API if possible

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This commit is contained in:
Laytan Laats
2024-03-15 21:10:11 +01:00
parent 04f0fbf23a
commit 9c455b2213
5 changed files with 458 additions and 2 deletions
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69
src/threading.cpp
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@@ -760,6 +760,11 @@ gb_internal void futex_wait(Futex *f, Footex val) {
#elif defined(GB_SYSTEM_OSX)
#if __has_include(<os/os_sync_wait_on_address.h>)
#define DARWIN_WAIT_ON_ADDRESS_AVAILABLE
#include <os/os_sync_wait_on_address.h>
#endif
#define UL_COMPARE_AND_WAIT 0x00000001
#define ULF_NO_ERRNO 0x01000000
@@ -767,6 +772,23 @@ extern "C" int __ulock_wait(uint32_t operation, void *addr, uint64_t value, uint
extern "C" int __ulock_wake(uint32_t operation, void *addr, uint64_t wake_value);
gb_internal void futex_signal(Futex *f) {
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
if (__builtin_available(macOS 14.4, *)) {
for (;;) {
int ret = os_sync_wake_by_address_any(f, sizeof(Futex), OS_SYNC_WAKE_BY_ADDRESS_NONE);
if (ret >= 0) {
return;
}
if (errno == EINTR || errno == EFAULT) {
continue;
}
if (errno == ENOENT) {
return;
}
GB_PANIC("Failed in futex wake %d %d!\n", ret, errno);
}
} else {
#endif
for (;;) {
int ret = __ulock_wake(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO, f, 0);
if (ret >= 0) {
@@ -780,9 +802,29 @@ gb_internal void futex_signal(Futex *f) {
}
GB_PANIC("Failed in futex wake!\n");
}
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
}
#endif
}
gb_internal void futex_broadcast(Futex *f) {
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
if (__builtin_available(macOS 14.4, *)) {
for (;;) {
int ret = os_sync_wake_by_address_all(f, sizeof(Footex), OS_SYNC_WAKE_BY_ADDRESS_NONE);
if (ret >= 0) {
return;
}
if (errno == EINTR || errno == EFAULT) {
continue;
}
if (errno == ENOENT) {
return;
}
GB_PANIC("Failed in futext wake %d %d!\n", ret, errno);
}
} else {
#endif
for (;;) {
enum { ULF_WAKE_ALL = 0x00000100 };
int ret = __ulock_wake(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO | ULF_WAKE_ALL, f, 0);
@@ -797,9 +839,32 @@ gb_internal void futex_broadcast(Futex *f) {
}
GB_PANIC("Failed in futex wake!\n");
}
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
}
#endif
}
gb_internal void futex_wait(Futex *f, Footex val) {
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
if (__builtin_available(macOS 14.4, *)) {
for (;;) {
int ret = os_sync_wait_on_address(f, cast(uint64_t)(val), sizeof(Footex), OS_SYNC_WAIT_ON_ADDRESS_NONE);
if (ret >= 0) {
if (*f != val) {
return;
}
continue;
}
if (errno == EINTR || errno == EFAULT) {
continue;
}
if (errno == ENOENT) {
return;
}
GB_PANIC("Failed in futex wait %d %d!\n", ret, errno);
}
} else {
#endif
for (;;) {
int ret = __ulock_wait(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO, f, val, 0);
if (ret >= 0) {
@@ -817,7 +882,11 @@ gb_internal void futex_wait(Futex *f, Footex val) {
GB_PANIC("Failed in futex wait!\n");
}
#ifdef DARWIN_WAIT_ON_ADDRESS_AVAILABLE
}
#endif
}
#elif defined(GB_SYSTEM_WINDOWS)
gb_internal void futex_signal(Futex *f) {