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lf_queue: implement wait() method

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Synchronization does not occupy additional space by reusing LSB
This commit is contained in:
Nekotekina 2019-01-11 20:44:10 +03:00
parent ac775cd75e
commit 81c50bad69
3 changed files with 53 additions and 12 deletions
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6
Utilities/sync.h
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@ -153,7 +153,7 @@ inline int futex(volatile void* uaddr, int futex_op, uint val, const timespec* t
template <typename T, typename Pred>
bool balanced_wait_until(atomic_t<T>& var, u64 usec_timeout, Pred&& pred)
{
static_assert(sizeof(T) == 4);
static_assert(sizeof(T) == 4 || sizeof(T) == 8);
const bool is_inf = usec_timeout > u64{UINT32_MAX / 1000} * 1000000;
@ -184,7 +184,7 @@ bool balanced_wait_until(atomic_t<T>& var, u64 usec_timeout, Pred&& pred)
{
while (!test_pred(value))
{
if (OptWaitOnAddress(&var, &value, sizeof(u32), is_inf ? INFINITE : usec_timeout / 1000))
if (OptWaitOnAddress(&var, &value, sizeof(T), is_inf ? INFINITE : usec_timeout / 1000))
{
if (!test_pred(value) && !test_pred(value, nullptr))
{
@ -260,7 +260,7 @@ bool balanced_wait_until(atomic_t<T>& var, u64 usec_timeout, Pred&& pred)
template <typename T>
void balanced_awaken(atomic_t<T>& var, u32 weight)
{
static_assert(sizeof(T) == 4);
static_assert(sizeof(T) == 4 || sizeof(T) == 8);
#ifdef _WIN32
if (OptWaitOnAddress)