mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-11 09:18:05 +03:00
649d2faeab
We had some inconsistencies before: - Sometimes "The", sometimes "the" - Sometimes trailing ".", sometimes no trailing "." I picked the most common one (lowecase "the", trailing ".") and applied it to all copyright headers. By using the exact same string everywhere we can ensure nothing gets missed during a global search (and replace), and that these inconsistencies are not spread any further (as copyright headers are commonly copied to new files).
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
|
|
* Copyright (c) 2020, the SerenityOS developers.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/Debug.h>
|
|
#include <Kernel/Thread.h>
|
|
#include <Kernel/WaitQueue.h>
|
|
|
|
namespace Kernel {
|
|
|
|
bool WaitQueue::should_add_blocker(Thread::Blocker& b, void* data)
|
|
{
|
|
VERIFY(data != nullptr); // Thread that is requesting to be blocked
|
|
VERIFY(m_lock.is_locked());
|
|
VERIFY(b.blocker_type() == Thread::Blocker::Type::Queue);
|
|
if (m_wake_requested || !m_should_block) {
|
|
m_wake_requested = false;
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: do not block thread {}, {}", this, data, m_should_block ? "wake was pending" : "not blocking");
|
|
return false;
|
|
}
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: should block thread {}", this, data);
|
|
return true;
|
|
}
|
|
|
|
u32 WaitQueue::wake_one()
|
|
{
|
|
u32 did_wake = 0;
|
|
ScopedSpinLock lock(m_lock);
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_one", this);
|
|
bool did_unblock_one = do_unblock([&](Thread::Blocker& b, void* data, bool& stop_iterating) {
|
|
VERIFY(data);
|
|
VERIFY(b.blocker_type() == Thread::Blocker::Type::Queue);
|
|
auto& blocker = static_cast<Thread::QueueBlocker&>(b);
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_one unblocking {}", this, data);
|
|
if (blocker.unblock()) {
|
|
stop_iterating = true;
|
|
did_wake = 1;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
m_wake_requested = !did_unblock_one;
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_one woke {} threads", this, did_wake);
|
|
return did_wake;
|
|
}
|
|
|
|
u32 WaitQueue::wake_n(u32 wake_count)
|
|
{
|
|
if (wake_count == 0)
|
|
return 0; // should we assert instead?
|
|
ScopedSpinLock lock(m_lock);
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_n({})", this, wake_count);
|
|
u32 did_wake = 0;
|
|
|
|
bool did_unblock_some = do_unblock([&](Thread::Blocker& b, void* data, bool& stop_iterating) {
|
|
VERIFY(data);
|
|
VERIFY(b.blocker_type() == Thread::Blocker::Type::Queue);
|
|
auto& blocker = static_cast<Thread::QueueBlocker&>(b);
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_n unblocking {}", this, data);
|
|
VERIFY(did_wake < wake_count);
|
|
if (blocker.unblock()) {
|
|
if (++did_wake >= wake_count)
|
|
stop_iterating = true;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
m_wake_requested = !did_unblock_some;
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_n({}) woke {} threads", this, wake_count, did_wake);
|
|
return did_wake;
|
|
}
|
|
|
|
u32 WaitQueue::wake_all()
|
|
{
|
|
ScopedSpinLock lock(m_lock);
|
|
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_all", this);
|
|
u32 did_wake = 0;
|
|
|
|
bool did_unblock_any = do_unblock([&](Thread::Blocker& b, void* data, bool&) {
|
|
VERIFY(data);
|
|
VERIFY(b.blocker_type() == Thread::Blocker::Type::Queue);
|
|
auto& blocker = static_cast<Thread::QueueBlocker&>(b);
|
|
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_all unblocking {}", this, data);
|
|
|
|
if (blocker.unblock()) {
|
|
did_wake++;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
m_wake_requested = !did_unblock_any;
|
|
dbgln_if(WAITQUEUE_DEBUG, "WaitQueue @ {}: wake_all woke {} threads", this, did_wake);
|
|
return did_wake;
|
|
}
|
|
|
|
}
|