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Diffstat (limited to 'ext/mahoro/nogvl_compat.h')
| -rw-r--r-- | ext/mahoro/nogvl_compat.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/ext/mahoro/nogvl_compat.h b/ext/mahoro/nogvl_compat.h new file mode 100644 index 0000000..c5b6778 --- /dev/null +++ b/ext/mahoro/nogvl_compat.h @@ -0,0 +1,54 @@ +#ifndef NOGVL_COMPAT_H +#define NOGVL_COMPAT_H +/* + * Compatibility layer for various GVL-releasing wrappers. + * + * This layer will be updated to favor compatibility with the latest + * Matz Ruby C API, currently Ruby 2.0.0 (as of 2013-04-05). + * + * rb_thread_call_without_gvl was detectable via have_func in 1.9.3, + * but not usable. So we must check for ruby/thread.h and use + * rb_thread_blocking_region if ruby/thread.h is not available + * + * HAVE_RUBY_THREAD_H is defined by ruby.h in 2.0.0, NOT using + * extconf.rb since that may find ruby/thread.h in a different + * installation + */ +#if defined(HAVE_RB_THREAD_CALL_WITHOUT_GVL) && \ + defined(HAVE_RUBY_THREAD_H) && HAVE_RUBY_THREAD_H /* Ruby 2.0.0 */ +# include <ruby/thread.h> +# define NOGVL(fn,data1,ubf,data2) \ + rb_thread_call_without_gvl((fn),(data1),(ubf),(data2)) +#elif defined(HAVE_RB_THREAD_BLOCKING_REGION) /* Ruby 1.9.x */ +# define COMPAT_FN (VALUE (*)(void *)) +# define NOGVL(fn,data1,ubf,data2) \ + (void *)rb_thread_blocking_region(COMPAT_FN(fn),(data1),(ubf),(data2)) +#else /* Ruby 1.8 */ +/* + * Ruby 1.8 does not have a GVL, we'll just enable signal interrupts + * here in case we make interruptible syscalls + */ +# define RUBY_UBF_IO ((rb_unblock_function_t *)-1) +# include "rubysig.h" +typedef void rb_unblock_function_t(void *); +typedef void *rb_blocking_function_t(void *); + +static void * +fake_nogvl(fn, data1, ubf, data2) + rb_blocking_function_t fn; + void *data1; + rb_unblock_function_t ubf; + void *data2; +{ + void *rv; + + TRAP_BEG; + rv = fn(data1); + TRAP_END; + + return rv; +} +# define NOGVL(fn,data1,ubf,data2) fake_nogvl((fn),(data1),(ubf),(data2)) +#endif + +#endif /* NOGVL_COMPAT_H */ |