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Use libc::SYS_futex_time64 on riscv32 #698

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Use libc::SYS_futex_time64 on riscv32 #698

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17 changes: 17 additions & 0 deletions src/backends/use_file.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -158,7 +158,18 @@ mod sync {
pub(super) fn wait() {
let op = libc::FUTEX_WAIT | libc::FUTEX_PRIVATE_FLAG;
let timeout_ptr = core::ptr::null::<libc::timespec>();
#[cfg(not(target_arch = "riscv32"))]
let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, FD_ONGOING_INIT, timeout_ptr) };
#[cfg(target_arch = "riscv32")]
let ret = unsafe {
libc::syscall(
libc::SYS_futex_time64,
&FD,
op,
FD_ONGOING_INIT,
timeout_ptr,
)
};
// FUTEX_WAIT should return either 0 or EAGAIN error
debug_assert!({
match ret {
Expand All @@ -172,7 +183,13 @@ mod sync {
/// Wake up all threads which wait for value of atomic `FD` to change.
pub(super) fn wake() {
let op = libc::FUTEX_WAKE | libc::FUTEX_PRIVATE_FLAG;

#[cfg(not(target_arch = "riscv32"))]
let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, libc::INT_MAX) };

#[cfg(target_arch = "riscv32")]
let ret = unsafe { libc::syscall(libc::SYS_futex_time64, &FD, op, libc::INT_MAX) };

debug_assert!(ret >= 0);
}

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