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use more abstract macros to decide which implementation to compile

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This commit is contained in:
Desour 2023-06-08 22:54:31 +02:00
parent 4f0085af00
commit 1c76f32d19
3 changed files with 57 additions and 48 deletions
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26
src/threading/ipc_channel.h
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@ -27,10 +27,18 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <vector>
#if defined(_WIN32)
#include <windows.h>
#define IPC_CHANNEL_IMPLEMENTATION_WIN32
#elif defined(__linux__)
#include <atomic>
#define IPC_CHANNEL_IMPLEMENTATION_LINUX_FUTEX
#else
#define IPC_CHANNEL_IMPLEMENTATION_POSIX
#endif
#if defined(IPC_CHANNEL_IMPLEMENTATION_WIN32)
#include <windows.h>
#elif defined(IPC_CHANNEL_IMPLEMENTATION_LINUX_FUTEX)
#include <atomic>
#elif defined(IPC_CHANNEL_IMPLEMENTATION_POSIX)
#include <pthread.h>
#endif
@ -52,8 +60,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
struct IPCChannelBuffer
{
#if !defined(_WIN32)
#if defined(__linux__)
#if defined(IPC_CHANNEL_IMPLEMENTATION_LINUX_FUTEX)
// possible values:
// 0: futex is not posted. reader will check value before blocking => no
// notify needed when posting
@ -61,12 +68,13 @@ struct IPCChannelBuffer
// 2: futex is not posted. reader is waiting with futex syscall, and needs
// to be notified
std::atomic<u32> futex{0};
#else
#elif defined(IPC_CHANNEL_IMPLEMENTATION_POSIX)
pthread_cond_t cond;
pthread_mutex_t mutex;
bool posted = false; // protected by mutex
#endif
#endif // !defined(_WIN32)
// Note: If the other side isn't acting cooperatively, they might write to
// this at any times. So we must make sure to copy out the data once, and
// only access that copy.
@ -89,7 +97,7 @@ struct IPCChannelStuff
{
virtual ~IPCChannelStuff() = default;
virtual IPCChannelShared *getShared() = 0;
#ifdef _WIN32
#if defined(IPC_CHANNEL_IMPLEMENTATION_WIN32)
virtual HANDLE getSemA() = 0;
virtual HANDLE getSemB() = 0;
#endif
@ -128,7 +136,7 @@ public:
inline size_t getRecvSize() const noexcept { return m_recv_size; }
private:
#if defined(_WIN32)
#if defined(IPC_CHANNEL_IMPLEMENTATION_WIN32)
IPCChannelEnd(
std::unique_ptr<IPCChannelStuff> stuff,
IPCChannelBuffer *in, IPCChannelBuffer *out,
@ -154,7 +162,7 @@ private:
std::unique_ptr<IPCChannelStuff> m_stuff;
IPCChannelBuffer *m_in = nullptr;
IPCChannelBuffer *m_out = nullptr;
#if defined(_WIN32)
#if defined(IPC_CHANNEL_IMPLEMENTATION_WIN32)
HANDLE m_sem_in;
HANDLE m_sem_out;
#endif