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os: add DetachIoRegionHandle

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This commit is contained in:
Michael Scire 2022-03-28 00:00:36 -07:00
parent 8e258bde9d
commit 4ad8dad416
3 changed files with 24 additions and 0 deletions
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1
libraries/libstratosphere/include/stratosphere/os/os_io_region_api.hpp
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@ -26,6 +26,7 @@ namespace ams::os {
Result CreateIoRegion(IoRegionType *io_region, NativeHandle io_pool_handle, uintptr_t address, size_t size, MemoryMapping mapping, MemoryPermission permission);
void AttachIoRegionHandle(IoRegionType *io_region, size_t size, NativeHandle handle, bool managed);
os::NativeHandle DetachIoRegionHandle(IoRegionType *io_region);
void DestroyIoRegion(IoRegionType *io_region);

1
libraries/libstratosphere/include/stratosphere/os/os_io_region_types.hpp
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@ -26,6 +26,7 @@ namespace ams::os {
State_NotInitialized = 0,
State_Initialized = 1,
State_Mapped = 2,
State_Detached = 3,
};
NativeHandle handle;

22
libraries/libstratosphere/source/os/os_io_region.cpp
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@ -69,6 +69,28 @@ namespace ams::os {
InitializeIoRegion(io_region, handle, size, managed);
}
os::NativeHandle DetachIoRegionHandle(IoRegionType *io_region) {
/* Check pre-conditions. */
AMS_ASSERT(io_region->state != IoRegionType::State_NotInitialized);
/* Acquire exclusive access to the io region. */
std::scoped_lock lk(util::GetReference(io_region->cs_io_region));
/* Check that we can detach. */
AMS_ASSERT(io_region->state == IoRegionType::State_Initialized);
/* Set state as detached. */
io_region->state = IoRegionType::State_Detached;
/* Detach the handle. */
const auto handle = io_region->handle;
io_region->handle = os::InvalidNativeHandle;
io_region->handle_managed = false;
return handle;
}
void DestroyIoRegion(IoRegionType *io_region) {
/* Check pre-conditions. */
AMS_ASSERT(io_region->state != IoRegionType::State_NotInitialized);