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Fix freezes on Linux (#2632)

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This commit is contained in:
Ivan 2017-04-04 23:27:16 +03:00 committed by GitHub
parent 65488078a4
commit 1ae334e500
1 changed files with 22 additions and 10 deletions
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32
Utilities/mutex.cpp
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@ -21,9 +21,12 @@ void shared_mutex::imp_lock_shared(s64 _old)
// Acquire writer lock
imp_wait(m_value.load());
// Convert value
// Convert to reader lock
s64 value = m_value.fetch_add(c_one - c_min);
// Proceed exclusively
return;
if (value != 0)
{
imp_unlock(value);
@ -35,7 +38,14 @@ void shared_mutex::imp_lock_shared(s64 _old)
NtWaitForKeyedEvent(nullptr, (int*)&m_value + 1, false, nullptr);
}
#else
while (true)
// Acquire writer lock
imp_wait(0);
// Convert to reader lock
m_value += c_one - c_min;
// Disabled code
while (false)
{
const s64 value0 = m_value.fetch_op([](s64& value)
{
@ -63,13 +73,13 @@ void shared_mutex::imp_lock_shared(s64 _old)
value1 += c_one - c_min;
if (value1 >= 0)
if (value1 > 0)
{
return;
}
// Wait as a reader if necessary
while (futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAIT_PRIVATE, int(value1 >> 32), nullptr, nullptr, 0))
while (futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAIT_BITSET_PRIVATE, int(value1 >> 32), nullptr, nullptr, INT_MIN))
{
value1 = m_value.load();
@ -110,7 +120,7 @@ void shared_mutex::imp_unlock_shared(s64 _old)
#else
m_value -= c_sig;
futex((int*)&m_value.raw() + IS_BE_MACHINE, FUTEX_WAKE_PRIVATE, 1, nullptr, nullptr, 0);
futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAKE_BITSET_PRIVATE, 1, nullptr, nullptr, u32(c_sig >> 32));
#endif
}
}
@ -145,7 +155,7 @@ void shared_mutex::imp_wait(s64)
return;
}
futex((int*)&m_value.raw() + IS_BE_MACHINE, FUTEX_WAIT_PRIVATE, int(value), nullptr, nullptr, 0);
futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAIT_BITSET_PRIVATE, int(value >> 32), nullptr, nullptr, u32(c_sig >> 32));
}
#endif
}
@ -180,8 +190,9 @@ void shared_mutex::imp_unlock(s64 _old)
{
NtReleaseKeyedEvent(nullptr, &m_value, false, nullptr);
}
else if (s64 count = -_old / c_min)
else if (s64 count = -_old / c_min * 0)
{
// Disabled code
while (count--)
{
NtReleaseKeyedEvent(nullptr, (int*)&m_value + 1, false, nullptr);
@ -192,11 +203,12 @@ void shared_mutex::imp_unlock(s64 _old)
{
m_value -= c_sig;
futex((int*)&m_value.raw() + IS_BE_MACHINE, FUTEX_WAKE_PRIVATE, 1, nullptr, nullptr, 0);
futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAKE_BITSET_PRIVATE, 1, nullptr, nullptr, u32(c_sig >> 32));
}
else if (s64 count = -_old / c_min)
else if (false)
{
futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAKE_PRIVATE, INT_MAX, nullptr, nullptr, 0);
// Disabled code
futex((int*)&m_value.raw() + IS_LE_MACHINE, FUTEX_WAKE_BITSET_PRIVATE, INT_MAX, nullptr, nullptr, INT_MIN);
}
#endif
}