be1bbd5b7d
This patch introduce M:N thread scheduler for Ractor system. In general, M:N thread scheduler employs N native threads (OS threads) to manage M user-level threads (Ruby threads in this case). On the Ruby interpreter, 1 native thread is provided for 1 Ractor and all Ruby threads are managed by the native thread. From Ruby 1.9, the interpreter uses 1:1 thread scheduler which means 1 Ruby thread has 1 native thread. M:N scheduler change this strategy. Because of compatibility issue (and stableness issue of the implementation) main Ractor doesn't use M:N scheduler on default. On the other words, threads on the main Ractor will be managed with 1:1 thread scheduler. There are additional settings by environment variables: `RUBY_MN_THREADS=1` enables M:N thread scheduler on the main ractor. Note that non-main ractors use the M:N scheduler without this configuration. With this configuration, single ractor applications run threads on M:1 thread scheduler (green threads, user-level threads). `RUBY_MAX_CPU=n` specifies maximum number of native threads for M:N scheduler (default: 8). This patch will be reverted soon if non-easy issues are found. [Bug #19842]
59 lines
1.1 KiB
C
59 lines
1.1 KiB
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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#define USE_VM_CLOCK 1
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WINBASEAPI BOOL WINAPI
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TryEnterCriticalSection(IN OUT LPCRITICAL_SECTION lpCriticalSection);
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struct rb_native_thread {
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HANDLE thread_id;
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HANDLE interrupt_event;
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};
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struct rb_thread_sched_item {
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void *vm_stack;
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};
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struct rb_thread_sched {
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HANDLE lock;
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};
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typedef DWORD native_tls_key_t; // TLS index
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static inline void *
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native_tls_get(native_tls_key_t key)
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{
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// return value should be checked by caller.
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return TlsGetValue(key);
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}
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static inline void
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native_tls_set(native_tls_key_t key, void *ptr)
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{
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if (UNLIKELY(TlsSetValue(key, ptr) == 0)) {
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rb_bug("TlsSetValue() error");
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}
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}
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RUBY_SYMBOL_EXPORT_BEGIN
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RUBY_EXTERN native_tls_key_t ruby_current_ec_key;
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RUBY_SYMBOL_EXPORT_END
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#endif /* RUBY_THREAD_WIN32_H */
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