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service/am: Implement EnterFatalSection and LeaveFatalSection

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These functions act in tandem similar to how a lock or mutex require a
balanced lock()/unlock() sequence.

EnterFatalSection simply increments a counter for how many times it has
been called, while LeaveFatalSection ensures that a previous call to
EnterFatalSection has occured. If a previous call has occurred (the
counter is not zero), then the counter gets decremented as one would
expect. If a previous call has not occurred (the counter is zero), then
an error code is returned.
This commit is contained in:
Lioncash
2019-03-26 15:12:09 -04:00
parent 96d518a59f
commit 758d84db9a
2 changed files with 29 additions and 2 deletions
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3
src/core/hle/service/am/am.h
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@ -119,6 +119,8 @@ public:
private:
void LockExit(Kernel::HLERequestContext& ctx);
void UnlockExit(Kernel::HLERequestContext& ctx);
void EnterFatalSection(Kernel::HLERequestContext& ctx);
void LeaveFatalSection(Kernel::HLERequestContext& ctx);
void GetLibraryAppletLaunchableEvent(Kernel::HLERequestContext& ctx);
void SetScreenShotPermission(Kernel::HLERequestContext& ctx);
void SetOperationModeChangedNotification(Kernel::HLERequestContext& ctx);
@ -135,6 +137,7 @@ private:
std::shared_ptr<NVFlinger::NVFlinger> nvflinger;
Kernel::EventPair launchable_event;
u32 idle_time_detection_extension = 0;
u64 num_fatal_sections_entered = 0;
};
class ICommonStateGetter final : public ServiceFramework<ICommonStateGetter> {