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Kernel: Allow clearing request_objects to re-use buffer space
Reduces the necessary allocation to max(in_handles, out_handles) rather than (in_handles + out_handles).
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3 changed files with 14 additions and 0 deletions
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@ -62,6 +62,9 @@ class RequestBuilder : public RequestHelperBase {
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public:
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RequestBuilder(Kernel::HLERequestContext& context, Header command_header)
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: RequestHelperBase(context, command_header) {
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// From this point we will start overwriting the existing command buffer, so it's safe to
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// release all previous incoming Object pointers since they won't be usable anymore.
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context.ClearIncomingObjects();
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cmdbuf[0] = header.raw;
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}
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@ -35,6 +35,10 @@ u32 HLERequestContext::AddOutgoingHandle(SharedPtr<Object> object) {
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return request_handles.size() - 1;
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}
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void HLERequestContext::ClearIncomingObjects() {
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request_handles.clear();
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}
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ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf,
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Process& src_process,
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HandleTable& src_table) {
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@ -110,6 +110,13 @@ public:
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*/
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u32 AddOutgoingHandle(SharedPtr<Object> object);
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/**
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* Discards all Objects from the context, invalidating all ids. This may be called after reading
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* out all incoming objects, so that the buffer memory can be re-used for outgoing handles, but
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* this is not required.
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*/
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void ClearIncomingObjects();
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private:
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friend class Service::ServiceFrameworkBase;
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