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author | Yuri Kunde Schlesner <yuriks@yuriks.net> | 2014-12-21 13:04:08 +0100 |
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committer | Yuri Kunde Schlesner <yuriks@yuriks.net> | 2014-12-28 14:52:55 +0100 |
commit | 7e2903cb74050d846f2da951dff7e84aee13761b (patch) | |
tree | 621c9245d2dd393a9569b1b4192f50a27d831972 /src/core/hle/kernel/kernel.cpp | |
parent | Kernel: Replace GetStaticHandleType by HANDLE_TYPE constants (diff) | |
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Diffstat (limited to 'src/core/hle/kernel/kernel.cpp')
-rw-r--r-- | src/core/hle/kernel/kernel.cpp | 118 |
1 files changed, 67 insertions, 51 deletions
diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp index e8bf83a44..e59ed1b57 100644 --- a/src/core/hle/kernel/kernel.cpp +++ b/src/core/hle/kernel/kernel.cpp @@ -17,73 +17,89 @@ HandleTable g_handle_table; u64 g_program_id = 0; HandleTable::HandleTable() { - next_id = INITIAL_NEXT_ID; + next_generation = 1; + Clear(); } -Handle HandleTable::Create(Object* obj, int range_bottom, int range_top) { - if (range_top > MAX_COUNT) { - range_top = MAX_COUNT; - } - if (next_id >= range_bottom && next_id < range_top) { - range_bottom = next_id++; - } - for (int i = range_bottom; i < range_top; i++) { - if (!occupied[i]) { - occupied[i] = true; - pool[i] = obj; - pool[i]->handle = i + HANDLE_OFFSET; - return i + HANDLE_OFFSET; - } +ResultVal<Handle> HandleTable::Create(Object* obj) { + _dbg_assert_(Kernel, obj != nullptr); + + u16 slot = next_free_slot; + if (slot >= generations.size()) { + LOG_ERROR(Kernel, "Unable to allocate Handle, too many slots in use."); + return ERR_OUT_OF_HANDLES; } - LOG_ERROR(Kernel, "Unable to allocate kernel object, too many objects slots in use."); - return 0; -} + next_free_slot = generations[slot]; -bool HandleTable::IsValid(Handle handle) const { - int index = handle - HANDLE_OFFSET; - if (index < 0) - return false; - if (index >= MAX_COUNT) - return false; + u16 generation = next_generation++; - return occupied[index]; + // Overflow count so it fits in the 15 bits dedicated to the generation in the handle. + // CTR-OS doesn't use generation 0, so skip straight to 1. + if (next_generation >= (1 << 15)) next_generation = 1; + + generations[slot] = generation; + intrusive_ptr_add_ref(obj); + objects[slot] = obj; + + Handle handle = generation | (slot << 15); + obj->handle = handle; + return MakeResult<Handle>(handle); } -void HandleTable::Clear() { - for (int i = 0; i < MAX_COUNT; i++) { - //brutally clear everything, no validation - if (occupied[i]) - delete pool[i]; - occupied[i] = false; +ResultVal<Handle> HandleTable::Duplicate(Handle handle) { + Object* object = GetGeneric(handle); + if (object == nullptr) { + LOG_ERROR(Kernel, "Tried to duplicate invalid handle: %08X", handle); + return ERR_INVALID_HANDLE; } - pool.fill(nullptr); - next_id = INITIAL_NEXT_ID; + return Create(object); } -Object* &HandleTable::operator [](Handle handle) -{ - _dbg_assert_msg_(Kernel, IsValid(handle), "GRABBING UNALLOCED KERNEL OBJ"); - return pool[handle - HANDLE_OFFSET]; +ResultCode HandleTable::Close(Handle handle) { + if (!IsValid(handle)) + return ERR_INVALID_HANDLE; + + size_t slot = GetSlot(handle); + u16 generation = GetGeneration(handle); + + intrusive_ptr_release(objects[slot]); + objects[slot] = nullptr; + + generations[generation] = next_free_slot; + next_free_slot = slot; + return RESULT_SUCCESS; } -void HandleTable::List() { - for (int i = 0; i < MAX_COUNT; i++) { - if (occupied[i]) { - if (pool[i]) { - LOG_DEBUG(Kernel, "KO %i: %s \"%s\"", i + HANDLE_OFFSET, pool[i]->GetTypeName().c_str(), - pool[i]->GetName().c_str()); - } - } - } +bool HandleTable::IsValid(Handle handle) const { + size_t slot = GetSlot(handle); + u16 generation = GetGeneration(handle); + + return slot < MAX_COUNT && objects[slot] != nullptr && generations[slot] == generation; } -int HandleTable::GetCount() const { - return std::count(occupied.begin(), occupied.end(), true); +Object* HandleTable::GetGeneric(Handle handle) const { + if (handle == CurrentThread) { + // TODO(yuriks) Directly return the pointer once this is possible. + handle = GetCurrentThreadHandle(); + } else if (handle == CurrentProcess) { + LOG_ERROR(Kernel, "Current process (%08X) pseudo-handle not supported", CurrentProcess); + return nullptr; + } + + if (!IsValid(handle)) { + return nullptr; + } + return objects[GetSlot(handle)]; } -Object* HandleTable::CreateByIDType(int type) { - LOG_ERROR(Kernel, "Unimplemented: %d.", type); - return nullptr; +void HandleTable::Clear() { + for (size_t i = 0; i < MAX_COUNT; ++i) { + generations[i] = i + 1; + if (objects[i] != nullptr) + intrusive_ptr_release(objects[i]); + objects[i] = nullptr; + } + next_free_slot = 0; } /// Initialize the kernel |