Change `futex_wait_with_timeout` to return a boolean rather than an `enum`

core/sync/sync2/futex_darwin.odin

@@ -23,26 +23,26 @@ EINTR     :: -4
 EFAULT    :: -14
 ETIMEDOUT :: -60
 
-_futex_wait :: proc(f: ^Futex, expected: u32) -> Futex_Error {
+_futex_wait :: proc(f: ^Futex, expected: u32) -> bool {
 	return _futex_wait_with_timeout(f, expected, 0)
 }
 
-_futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> Futex_Error {
+_futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> bool {
 	timeout_ns := u64(duration)
 	
 	s := __ulock_wait2(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO, f, u64(expected), timeout_ns, 0)
 	if s >= 0 {
-		return nil
+		return true
 	}
 	switch s {
 	case EINTR, EFAULT:
-		return nil
+		return true
 	case ETIMEDOUT:
-		return .Timed_Out
+		return false
 	case:
 		panic("futex_wait failure")
 	}
-	return nil
+	return true
 
 }
 

core/sync/sync2/futex_linux.odin

@@ -39,22 +39,22 @@ internal_futex :: proc(f: ^Futex, op: c.int, val: u32, timeout: rawptr) -> int {
 }
 
 
-_futex_wait :: proc(f: ^Futex, expected: u32) -> Futex_Error {
+_futex_wait :: proc(f: ^Futex, expected: u32) -> bool {
 	err := internal_futex(f, FUTEX_WAIT_PRIVATE | FUTEX_WAIT, expected, nil)
 	switch err {
 	case ESUCCESS, EINTR, EAGAIN, EINVAL:
 		// okay
 	case ETIMEDOUT:
-		return .Timed_Out
+		return false
 	case EFAULT: 
 		fallthrough
 	case:
 		panic("futex_wait failure")
 	}
-	return nil
+	return true
 }
 
-_futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> Futex_Error {
+_futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> bool {
 	timespec_t :: struct {
 		tv_sec:  c.long,
 		tv_nsec: c.long,
@@ -74,13 +74,13 @@ _futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Durati
 	case ESUCCESS, EINTR, EAGAIN, EINVAL:
 		// okay
 	case ETIMEDOUT:
-		return .Timed_Out
+		return false
 	case EFAULT: 
 		fallthrough
 	case:
 		panic("futex_wait_with_timeout failure")
 	}
-	return nil
+	return true
 }
 
 

core/sync/sync2/futex_windows.odin

@@ -20,13 +20,13 @@ foreign Synchronization {
 
 
 
-_futex_wait :: proc(f: ^Futex, expect: u32) -> Futex_Error {
+_futex_wait :: proc(f: ^Futex, expect: u32) -> bool {
 	expect := expect
 	ok := RtlWaitOnAddress(f, &expect, size_of(expect), nil)
-	return nil if ok else .Timed_Out
+	return bool(ok)
 }
 
-_futex_wait_with_timeout :: proc(f: ^Futex, expect: u32, duration: time.Duration) -> Futex_Error {
+_futex_wait_with_timeout :: proc(f: ^Futex, expect: u32, duration: time.Duration) -> bool {
 	expect := expect
 	
 	timeout: i64
@@ -38,7 +38,7 @@ _futex_wait_with_timeout :: proc(f: ^Futex, expect: u32, duration: time.Duration
 	}
 	\
 	ok := RtlWaitOnAddress(f, &expect, size_of(expect), timeout_ptr)
-	return nil if ok else .Timed_Out
+	return bool(ok)
 }
 
 _futex_wake_single :: proc(f: ^Futex) {

core/sync/sync2/primitives.odin

@@ -202,25 +202,21 @@ sema_post :: proc(s: ^Sema, count := 1) {
 // An Futex must not be copied after first use
 Futex :: distinct u32
 
-Futex_Error :: enum {
-	None,
-	Timed_Out,
-}
-
 futex_wait :: proc(f: ^Futex, expected: u32) {
 	if u32(atomic_load(f)) != expected {
 		return
 	}
 	
-	assert(_futex_wait(f, expected) != nil, "futex_wait failure")
+	assert(_futex_wait(f, expected), "futex_wait failure")
 }
 
-futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> Futex_Error {
+// returns true if the wait happened within the duration, false if it exceeded the time duration
+futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> bool {
 	if u32(atomic_load(f)) != expected {
-		return nil
+		return true
 	}
 	if duration == 0 {
-		return .Timed_Out	
+		return false
 	}	
 	
 	return _futex_wait_with_timeout(f, expected, duration)

core/sync/sync2/primitives_atomic.odin

@@ -307,7 +307,7 @@ queue_item_wait_with_timeout :: proc(item: ^Queue_Item, duration: time.Duration)
 		if remaining < 0 {
 			return false
 		}
-		if futex_wait_with_timeout(&item.futex, 0, remaining) == .Timed_Out {
+		if !futex_wait_with_timeout(&item.futex, 0, remaining) {
 			return false
 		}
 		cpu_relax()