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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_readable_event.h"
#include "core/hle/kernel/svc.h"
namespace Kernel::Svc {
/// Close a handle
Result CloseHandle(Core::System& system, Handle handle) {
LOG_TRACE(Kernel_SVC, "Closing handle 0x{:08X}", handle);
// Remove the handle.
R_UNLESS(system.Kernel().CurrentProcess()->GetHandleTable().Remove(handle),
ResultInvalidHandle);
return ResultSuccess;
}
Result CloseHandle32(Core::System& system, Handle handle) {
return CloseHandle(system, handle);
}
/// Clears the signaled state of an event or process.
Result ResetSignal(Core::System& system, Handle handle) {
LOG_DEBUG(Kernel_SVC, "called handle 0x{:08X}", handle);
// Get the current handle table.
const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
// Try to reset as readable event.
{
KScopedAutoObject readable_event = handle_table.GetObject<KReadableEvent>(handle);
if (readable_event.IsNotNull()) {
return readable_event->Reset();
}
}
// Try to reset as process.
{
KScopedAutoObject process = handle_table.GetObject<KProcess>(handle);
if (process.IsNotNull()) {
return process->Reset();
}
}
LOG_ERROR(Kernel_SVC, "invalid handle (0x{:08X})", handle);
return ResultInvalidHandle;
}
Result ResetSignal32(Core::System& system, Handle handle) {
return ResetSignal(system, handle);
}
/// Wait for the given handles to synchronize, timeout after the specified nanoseconds
Result WaitSynchronization(Core::System& system, s32* index, VAddr handles_address, s32 num_handles,
s64 nano_seconds) {
LOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, num_handles={}, nano_seconds={}",
handles_address, num_handles, nano_seconds);
// Ensure number of handles is valid.
R_UNLESS(0 <= num_handles && num_handles <= ArgumentHandleCountMax, ResultOutOfRange);
auto& kernel = system.Kernel();
std::vector<KSynchronizationObject*> objs(num_handles);
const auto& handle_table = kernel.CurrentProcess()->GetHandleTable();
Handle* handles = system.Memory().GetPointer<Handle>(handles_address);
// Copy user handles.
if (num_handles > 0) {
// Convert the handles to objects.
R_UNLESS(handle_table.GetMultipleObjects<KSynchronizationObject>(objs.data(), handles,
num_handles),
ResultInvalidHandle);
for (const auto& obj : objs) {
kernel.RegisterInUseObject(obj);
}
}
// Ensure handles are closed when we're done.
SCOPE_EXIT({
for (s32 i = 0; i < num_handles; ++i) {
kernel.UnregisterInUseObject(objs[i]);
objs[i]->Close();
}
});
return KSynchronizationObject::Wait(kernel, index, objs.data(), static_cast<s32>(objs.size()),
nano_seconds);
}
Result WaitSynchronization32(Core::System& system, u32 timeout_low, u32 handles_address,
s32 num_handles, u32 timeout_high, s32* index) {
const s64 nano_seconds{(static_cast<s64>(timeout_high) << 32) | static_cast<s64>(timeout_low)};
return WaitSynchronization(system, index, handles_address, num_handles, nano_seconds);
}
/// Resumes a thread waiting on WaitSynchronization
Result CancelSynchronization(Core::System& system, Handle handle) {
LOG_TRACE(Kernel_SVC, "called handle=0x{:X}", handle);
// Get the thread from its handle.
KScopedAutoObject thread =
system.Kernel().CurrentProcess()->GetHandleTable().GetObject<KThread>(handle);
R_UNLESS(thread.IsNotNull(), ResultInvalidHandle);
// Cancel the thread's wait.
thread->WaitCancel();
return ResultSuccess;
}
Result CancelSynchronization32(Core::System& system, Handle handle) {
return CancelSynchronization(system, handle);
}
void SynchronizePreemptionState(Core::System& system) {
auto& kernel = system.Kernel();
// Lock the scheduler.
KScopedSchedulerLock sl{kernel};
// If the current thread is pinned, unpin it.
KProcess* cur_process = system.Kernel().CurrentProcess();
const auto core_id = GetCurrentCoreId(kernel);
if (cur_process->GetPinnedThread(core_id) == GetCurrentThreadPointer(kernel)) {
// Clear the current thread's interrupt flag.
GetCurrentThread(kernel).ClearInterruptFlag();
// Unpin the current thread.
cur_process->UnpinCurrentThread(core_id);
}
}
} // namespace Kernel::Svc
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