#pragma once

// #thread_primitives #move?
#if OS_WINDOWS
  struct Condition_Variable {
    CONDITION_VARIABLE condition_variable;
  };
  struct Semaphore {
    HANDLE event;
  };
  struct Mutex {
    CRITICAL_SECTION csection;
  };
  struct OS_Thread {
    HANDLE windows_thread;
    s32 windows_thread_id;
  };
  struct File {
    HANDLE handle;
  };
#endif
#define POSIX_THREADS OS_LINUX || OS_MACOS || OS_IOS || OS_ANDROID
#if OS_MACOS
  struct Semaphore {
    task_t owner;
    semaphore_t event = 0;
  };
#endif
#if OS_LINUX || OS_ANDROID
  struct Semaphore {
    sem_t semaphore;
  };
#endif
#if OS_IS_UNIX // #posix threads
  struct OS_Thread {
    pthread_t thread_handle;
    Semaphore is_alive;
    Semaphore suspended;
    b32 is_done;
  };
#endif

internal void mutex_init (Mutex* mutex);
internal void mutex_destroy (Mutex* mutex);
internal void lock (Mutex* mutex);
internal void unlock (Mutex* mutex);

#define lock_guard(x) \
    Mutex_Lock_Guard Concat(_auto_lock_guard_, __LINE__)(x)
    
struct Mutex_Lock_Guard {
  Mutex* mutex;
  
  Mutex_Lock_Guard (Mutex* mutex) {
    this->mutex = mutex;
    lock(mutex);
  }
  
  ~Mutex_Lock_Guard () {
    unlock(mutex);
  }
};