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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 "common/scratch_buffer.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(GetCurrentProcess(system.Kernel()).GetHandleTable().Remove(handle),
ResultInvalidHandle);
R_SUCCEED();
}
/// 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 = GetCurrentProcess(system.Kernel()).GetHandleTable();
// Try to reset as readable event.
{
KScopedAutoObject readable_event = handle_table.GetObject<KReadableEvent>(handle);
if (readable_event.IsNotNull()) {
R_RETURN(readable_event->Reset());
}
}
// Try to reset as process.
{
KScopedAutoObject process = handle_table.GetObject<KProcess>(handle);
if (process.IsNotNull()) {
R_RETURN(process->Reset());
}
}
R_THROW(ResultInvalidHandle);
}
/// Wait for the given handles to synchronize, timeout after the specified nanoseconds
Result WaitSynchronization(Core::System& system, int32_t* out_index, u64 user_handles,
int32_t num_handles, int64_t timeout_ns) {
LOG_TRACE(Kernel_SVC, "called user_handles={:#x}, num_handles={}, timeout_ns={}", user_handles,
num_handles, timeout_ns);
// Ensure number of handles is valid.
R_UNLESS(0 <= num_handles && num_handles <= Svc::ArgumentHandleCountMax, ResultOutOfRange);
// Get the synchronization context.
auto& kernel = system.Kernel();
auto& handle_table = GetCurrentProcess(kernel).GetHandleTable();
auto objs = GetCurrentThread(kernel).GetSynchronizationObjectBuffer();
auto handles = GetCurrentThread(kernel).GetHandleBuffer();
// Copy user handles.
if (num_handles > 0) {
// Ensure we can try to get the handles.
R_UNLESS(GetCurrentMemory(kernel).IsValidVirtualAddressRange(
user_handles, static_cast<u64>(sizeof(Handle) * num_handles)),
ResultInvalidPointer);
// Get the handles.
GetCurrentMemory(kernel).ReadBlock(user_handles, handles.data(),
sizeof(Handle) * num_handles);
// Convert the handles to objects.
R_UNLESS(handle_table.GetMultipleObjects<KSynchronizationObject>(
objs.data(), handles.data(), num_handles),
ResultInvalidHandle);
}
// Ensure handles are closed when we're done.
SCOPE_EXIT({
for (auto i = 0; i < num_handles; ++i) {
objs[i]->Close();
}
});
// Wait on the objects.
Result res =
KSynchronizationObject::Wait(kernel, out_index, objs.data(), num_handles, timeout_ns);
R_SUCCEED_IF(res == ResultSessionClosed);
R_RETURN(res);
}
/// 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 =
GetCurrentProcess(system.Kernel()).GetHandleTable().GetObject<KThread>(handle);
R_UNLESS(thread.IsNotNull(), ResultInvalidHandle);
// Cancel the thread's wait.
thread->WaitCancel();
R_SUCCEED();
}
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 = GetCurrentProcessPointer(kernel);
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);
}
}
Result CloseHandle64(Core::System& system, Handle handle) {
R_RETURN(CloseHandle(system, handle));
}
Result ResetSignal64(Core::System& system, Handle handle) {
R_RETURN(ResetSignal(system, handle));
}
Result WaitSynchronization64(Core::System& system, int32_t* out_index, uint64_t handles,
int32_t num_handles, int64_t timeout_ns) {
R_RETURN(WaitSynchronization(system, out_index, handles, num_handles, timeout_ns));
}
Result CancelSynchronization64(Core::System& system, Handle handle) {
R_RETURN(CancelSynchronization(system, handle));
}
void SynchronizePreemptionState64(Core::System& system) {
SynchronizePreemptionState(system);
}
Result CloseHandle64From32(Core::System& system, Handle handle) {
R_RETURN(CloseHandle(system, handle));
}
Result ResetSignal64From32(Core::System& system, Handle handle) {
R_RETURN(ResetSignal(system, handle));
}
Result WaitSynchronization64From32(Core::System& system, int32_t* out_index, uint32_t handles,
int32_t num_handles, int64_t timeout_ns) {
R_RETURN(WaitSynchronization(system, out_index, handles, num_handles, timeout_ns));
}
Result CancelSynchronization64From32(Core::System& system, Handle handle) {
R_RETURN(CancelSynchronization(system, handle));
}
void SynchronizePreemptionState64From32(Core::System& system) {
SynchronizePreemptionState(system);
}
} // namespace Kernel::Svc
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