Drop old semaphore implementation

- Removed platform-specific implementations.
- Now all semaphores are in-object, unless they need to be conditionally created.
- Similarly to `Mutex`, provided a dummy implementation for when `NO_THREADS` is defined.
- Similarly to `Mutex`, methods are made `const` for easy use in such contexts.
- Language bindings updated: `wait()` and `post()` are now `void`.
- Language bindings updated: `try_wait()` added.

Bonus:
- Rewritten the `#ifdef` in `mutex.h` to meet the code style.

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/unix/os_unix.cpp b/drivers/unix/os_unix.cpp
index 1d94b9618d..f7da18a7f9 100644
--- a/drivers/unix/os_unix.cpp
+++ b/drivers/unix/os_unix.cpp
@@ -38,7 +38,6 @@
 #include "drivers/unix/file_access_unix.h"
 #include "drivers/unix/net_socket_posix.h"
 #include "drivers/unix/rw_lock_posix.h"
-#include "drivers/unix/semaphore_posix.h"
 #include "drivers/unix/thread_posix.h"
 #include "servers/visual_server.h"
 
@@ -121,13 +120,9 @@ void OS_Unix::initialize_core() {
 
 #ifdef NO_THREADS
 	ThreadDummy::make_default();
-	SemaphoreDummy::make_default();
 	RWLockDummy::make_default();
 #else
 	ThreadPosix::make_default();
-#if !defined(OSX_ENABLED) && !defined(IPHONE_ENABLED)
-	SemaphorePosix::make_default();
-#endif
 	RWLockPosix::make_default();
 #endif
 	FileAccess::make_default<FileAccessUnix>(FileAccess::ACCESS_RESOURCES);