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ruby--ruby/thread_win32.h
卜部昌平 4ff3f20540 add #include guard hack
According to MSVC manual (*1), cl.exe can skip including a header file
when that:

- contains #pragma once, or
- starts with #ifndef, or
- starts with #if ! defined.

GCC has a similar trick (*2), but it acts more stricter (e. g. there
must be _no tokens_ outside of #ifndef...#endif).

Sun C lacked #pragma once for a looong time.  Oracle Developer Studio
12.5 finally implemented it, but we cannot assume such recent version.

This changeset modifies header files so that each of them include
strictly one #ifndef...#endif.  I believe this is the most portable way
to trigger compiler optimizations. [Bug ]

*1: https://docs.microsoft.com/en-us/cpp/preprocessor/once
*2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
2020-04-13 16:06:00 +09:00

35 lines
777 B
C

#ifndef RUBY_THREAD_WIN32_H
#define RUBY_THREAD_WIN32_H
/**********************************************************************
thread_win32.h -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
/* interface */
# ifdef __CYGWIN__
# undef _WIN32
# endif
WINBASEAPI BOOL WINAPI
TryEnterCriticalSection(IN OUT LPCRITICAL_SECTION lpCriticalSection);
typedef struct rb_thread_cond_struct {
struct cond_event_entry *next;
struct cond_event_entry *prev;
} rb_nativethread_cond_t;
typedef struct native_thread_data_struct {
HANDLE interrupt_event;
} native_thread_data_t;
typedef struct rb_global_vm_lock_struct {
HANDLE lock;
} rb_global_vm_lock_t;
#endif /* RUBY_THREAD_WIN32_H */