mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-25 06:01:13 +00:00
141 lines
4.5 KiB
C++
141 lines
4.5 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#if defined(ATMOSPHERE_IS_STRATOSPHERE)
|
|
#include <stratosphere.hpp>
|
|
#elif defined(ATMOSPHERE_IS_MESOSPHERE)
|
|
#include <mesosphere.hpp>
|
|
#elif defined(ATMOSPHERE_IS_EXOSPHERE)
|
|
#include <exosphere.hpp>
|
|
#else
|
|
#include <vapours.hpp>
|
|
#endif
|
|
|
|
namespace ams::prfile2 {
|
|
|
|
#if defined(AMS_PRFILE2_THREAD_SAFE)
|
|
|
|
struct CriticalSection::Resource {
|
|
os::MutexType mutex;
|
|
bool in_use;
|
|
};
|
|
|
|
namespace {
|
|
|
|
constexpr inline const auto NumCriticalSectionResources = 5 /* TODO: NumVolumes */;
|
|
|
|
constinit os::SdkMutex g_crit_resource_mutex;
|
|
constinit CriticalSection::Resource g_crit_resources[NumCriticalSectionResources];
|
|
|
|
CriticalSection::Resource *AllocateCriticalSectionResource() {
|
|
std::scoped_lock lk(g_crit_resource_mutex);
|
|
|
|
for (auto &resource : g_crit_resources) {
|
|
if (!resource.in_use) {
|
|
resource.in_use = true;
|
|
return std::addressof(resource);
|
|
}
|
|
}
|
|
|
|
AMS_ABORT("Failed to allocate critical section resource");
|
|
}
|
|
|
|
void AcquireCriticalSectionResource(CriticalSection::Resource *resource) {
|
|
return os::LockMutex(std::addressof(resource->mutex));
|
|
}
|
|
|
|
void ReleaseCriticalSectionResource(CriticalSection::Resource *resource) {
|
|
return os::UnlockMutex(std::addressof(resource->mutex));
|
|
}
|
|
|
|
}
|
|
|
|
void InitializeCriticalSection(CriticalSection *cs) {
|
|
/* Check pre-condition. */
|
|
AMS_ASSERT(cs->state == CriticalSection::State_NotInitialized);
|
|
|
|
/* Perform initialization. */
|
|
if (cs->state == CriticalSection::State_NotInitialized) {
|
|
cs->resource = AllocateCriticalSectionResource();
|
|
cs->owner = 0;
|
|
cs->state = CriticalSection::State_Initialized;
|
|
}
|
|
}
|
|
|
|
void FinalizeCriticalSection(CriticalSection *cs) {
|
|
/* Check pre-condition. */
|
|
AMS_ASSERT(cs->state == CriticalSection::State_Initialized);
|
|
|
|
/* TODO */
|
|
AMS_UNUSED(cs);
|
|
AMS_ABORT("prfile2::FinalizeCriticalSection");
|
|
}
|
|
|
|
void EnterCriticalSection(CriticalSection *cs) {
|
|
/* Check pre-condition. */
|
|
AMS_ASSERT(cs->state == CriticalSection::State_Initialized);
|
|
|
|
if (AMS_LIKELY(cs->lock_count == 0)) {
|
|
/* Acquire the lock .*/
|
|
AcquireCriticalSectionResource(cs->resource);
|
|
system::GetCurrentContextId(std::addressof(cs->owner));
|
|
} else {
|
|
/* Get the current context id. */
|
|
u64 current_context_id;
|
|
system::GetCurrentContextId(std::addressof(current_context_id));
|
|
|
|
/* If the lock isn't already held, acquire it. */
|
|
if (cs->owner != current_context_id) {
|
|
AcquireCriticalSectionResource(cs->resource);
|
|
cs->owner = current_context_id;
|
|
}
|
|
}
|
|
|
|
/* Increment the lock count. */
|
|
++cs->lock_count;
|
|
}
|
|
|
|
void ExitCriticalSection(CriticalSection *cs) {
|
|
/* Check pre-condition. */
|
|
AMS_ASSERT(cs->state == CriticalSection::State_Initialized);
|
|
|
|
/* Unlock. */
|
|
if ((--cs->lock_count) == 0) {
|
|
cs->owner = 0;
|
|
ReleaseCriticalSectionResource(cs->resource);
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
void InitializeCriticalSection(CriticalSection *cs) {
|
|
AMS_UNUSED(cs);
|
|
}
|
|
|
|
void FinalizeCriticalSection(CriticalSection *cs) {
|
|
AMS_UNUSED(cs);
|
|
}
|
|
|
|
void EnterCriticalSection(CriticalSection *cs) {
|
|
AMS_UNUSED(cs);
|
|
}
|
|
|
|
void ExitCriticalSection(CriticalSection *cs) {
|
|
AMS_UNUSED(cs);
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|