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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 #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
35 lines
777 B
C
35 lines
777 B
C
#ifndef RUBY_THREAD_WIN32_H
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#define RUBY_THREAD_WIN32_H
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/**********************************************************************
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thread_win32.h -
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$Author$
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Copyright (C) 2004-2007 Koichi Sasada
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**********************************************************************/
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/* interface */
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# ifdef __CYGWIN__
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# undef _WIN32
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# endif
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WINBASEAPI BOOL WINAPI
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TryEnterCriticalSection(IN OUT LPCRITICAL_SECTION lpCriticalSection);
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typedef struct rb_thread_cond_struct {
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struct cond_event_entry *next;
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struct cond_event_entry *prev;
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} rb_nativethread_cond_t;
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typedef struct native_thread_data_struct {
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HANDLE interrupt_event;
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} native_thread_data_t;
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typedef struct rb_global_vm_lock_struct {
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HANDLE lock;
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} rb_global_vm_lock_t;
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#endif /* RUBY_THREAD_WIN32_H */
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