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https://github.com/hrydgard/ppsspp.git
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libretroadmin
f1208a7a5a
The core and the headless tools no longer use mutexes, condition variables, spinlocks, std::atomic, std::thread or volatile flags. Threads hand off through libretro-common's retro_atomic and rthreads plus a few small pieces on top of them in Common/Thread: Thread, MpscQueue, EventCounter, ParkingLot waits and ReaderGate. Every wait blocks until it's woken; nothing polls on a timer. State that only one thread touches just loses its lock. The PSP filesystem, sceIo and the savedata dialog now belong to the emulation thread: async reads and writes run when they're queued and complete later in emulated time, and the IO and savedata threads are gone. The friend finder only talks to the adhoc server and hands what it gets to the emulation thread. GPU init always runs on the thread that starts the game. The Vulkan render and compile queues, pipeline and render pass caches, delete list and SPIR-V cache, the GL render queue, the software renderer's jit caches, the file loader caches, the web debugger, UPnP, input, savestates, logging and the GE debugger all hand off through queues and atomics. The IR jit's spinning profiler thread goes. A CPU thread with nothing to run now sleeps until work is queued instead of spinning. Headless with --debugger waits for a client while stopped, and ends the run once every client that connected has left. Web server shutdown keeps servicing the CPU queue until the server has finished.
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <vector>
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#include <retro_atomic.h>
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#include "Common/File/Path.h"
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#include "Common/Net/Cancel.h"
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#include "Common/Net/HTTPClient.h"
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#include "Common/Net/Resolve.h"
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#include "Common/Net/URL.h"
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#include "Common/CommonTypes.h"
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#include "Core/Loaders.h"
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// Prepared (FileSize/Exists) before reads start, then read from one thread at a time: the worker
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// of the CachingFileLoader that ConstructFileLoader wraps it in. Cancel and LatestError are any thread.
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class HTTPFileLoader : public FileLoader {
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public:
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HTTPFileLoader(const ::Path &filename);
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~HTTPFileLoader();
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bool IsRemote() override {
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return true;
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}
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bool Exists() override;
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bool ExistsFast() override;
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bool IsDirectory() override;
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s64 FileSize() override;
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Path GetPath() const override;
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size_t ReadAt(s64 absolutePos, size_t bytes, size_t count, void *data, Flags flags = Flags::NONE) override {
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return ReadAt(absolutePos, bytes * count, data, flags) / bytes;
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}
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size_t ReadAt(s64 absolutePos, size_t bytes, void *data, Flags flags = Flags::NONE) override;
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void Cancel() override {
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cancel_.Cancel();
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}
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std::string LatestError() const override {
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return (const char *)retro_atomic_load_acquire_ptr(const_cast<retro_atomic_ptr_t *>(&latestError_));
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}
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private:
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void Prepare();
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void SetError(const char *error) {
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retro_atomic_store_release_ptr(&latestError_, (void *)error);
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}
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int SendHEAD(const Url &url, std::vector<std::string> &responseHeaders);
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void Connect(double timeout);
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void Disconnect() {
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if (connected_) {
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client_.Disconnect();
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}
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connected_ = false;
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}
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s64 filesize_ = 0;
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s64 filepos_ = 0;
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Url url_;
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http::Client client_;
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net::RequestProgress progress_;
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::Path filename_;
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bool connected_ = false;
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net::CancelToken cancel_;
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// Always a string literal.
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retro_atomic_ptr_t latestError_{ (void *)"" };
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bool prepared_ = false;
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};
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