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c9f982d4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40972 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/**********************************************************************
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gc_hook.c - GC hook mechanism/ObjectSpace extender for MRI.
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$Author$
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created at: Tue May 28 01:34:25 2013
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NOTE: This extension library is not expected to exist except C Ruby.
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NOTE: This feature is an example usage of internal event tracing APIs.
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All the files in this distribution are covered under the Ruby's
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license (see the file COPYING).
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**********************************************************************/
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#include "ruby/ruby.h"
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#include "ruby/debug.h"
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static void
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invoke_proc(void *data)
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{
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VALUE proc = (VALUE)data;
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rb_proc_call(proc, rb_ary_new());
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}
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static void
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gc_start_end_i(VALUE tpval, void *data)
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{
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rb_trace_arg_t *tparg = rb_tracearg_from_tracepoint(tpval);
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if (0) fprintf(stderr, "trace: %s\n", rb_tracearg_event_flag(tparg) == RUBY_INTERNAL_EVENT_GC_START ? "gc_start" : "gc_end");
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rb_postponed_job_register(0, invoke_proc, data);
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}
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static VALUE
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set_gc_hook(VALUE rb_mObjSpace, VALUE proc, rb_event_flag_t event, const char *tp_str, const char *proc_str)
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{
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VALUE tpval;
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ID tp_key = rb_intern(tp_str);
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ID proc_key = rb_intern(proc_str);
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if (RTEST(tpval = rb_ivar_get(rb_mObjSpace, tp_key))) {
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rb_tracepoint_disable(tpval);
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rb_ivar_set(rb_mObjSpace, tp_key, Qnil);
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rb_ivar_set(rb_mObjSpace, proc_key, Qnil);
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}
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if (RTEST(proc)) {
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if (!rb_obj_is_proc(proc)) {
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rb_raise(rb_eTypeError, "trace_func needs to be Proc");
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}
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tpval = rb_tracepoint_new(0, event, gc_start_end_i, (void *)proc);
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rb_ivar_set(rb_mObjSpace, tp_key, tpval);
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rb_ivar_set(rb_mObjSpace, proc_key, proc); /* GC guard */
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rb_tracepoint_enable(tpval);
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}
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return proc;
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}
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static VALUE
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set_after_gc_start(VALUE rb_mObjSpace, VALUE proc)
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{
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return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_START,
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"__set_after_gc_start_tpval__", "__set_after_gc_start_proc__");
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}
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static VALUE
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set_after_gc_end(VALUE rb_mObjSpace, VALUE proc)
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{
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return set_gc_hook(rb_mObjSpace, proc, RUBY_INTERNAL_EVENT_GC_END,
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"__set_after_gc_end_tpval__", "__set_after_gc_end_proc__");
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}
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void
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Init_gc_hook(VALUE rb_mObjSpace)
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{
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rb_define_module_function(rb_mObjSpace, "after_gc_start_hook=", set_after_gc_start, 1);
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rb_define_module_function(rb_mObjSpace, "after_gc_end_hook=", set_after_gc_end, 1);
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}
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