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#include "ruby/ruby.h"
#include "ruby/debug.h"
static int invoking; TODO
static VALUE
invoke_proc_ensure(void *dmy)
{
invoking = 0;
return Qnil;
}
static VALUE
invoke_proc_begin(VALUE proc)
{
return rb_proc_call(proc, rb_ary_new());
}
static void
invoke_proc(void *data)
{
VALUE proc = (VALUE)data;
invoking += 1;
rb_ensure(invoke_proc_begin, proc, invoke_proc_ensure, 0);
}
static void
gc_start_end_i(VALUE tpval, void *data)
{
if (0) {
rb_trace_arg_t *tparg = rb_tracearg_from_tracepoint(tpval);
fprintf(stderr, "trace: %s\n", rb_tracearg_event_flag(tparg) == RUBY_INTERNAL_EVENT_GC_START ? "gc_start" : "gc_end");
}
if (invoking == 0) {
rb_postponed_job_register(0, invoke_proc, data);
}
}
static VALUE
set_gc_hook(VALUE module, VALUE proc, rb_event_flag_t event, const char *tp_str, const char *proc_str)
{
VALUE tpval;
ID tp_key = rb_intern(tp_str);
ID proc_key = rb_intern(proc_str);
if (rb_ivar_defined(module, tp_key) != 0 &&
RTEST(tpval = rb_ivar_get(module, tp_key))) {
rb_tracepoint_disable(tpval);
rb_ivar_set(module, tp_key, Qnil);
rb_ivar_set(module, proc_key, Qnil);
}
if (RTEST(proc)) {
if (!rb_obj_is_proc(proc)) {
rb_raise(rb_eTypeError, "trace_func needs to be Proc");
}
tpval = rb_tracepoint_new(0, event, gc_start_end_i, (void *)proc);
rb_ivar_set(module, tp_key, tpval);
rb_ivar_set(module, proc_key, proc);
rb_tracepoint_enable(tpval);
}
return proc;
}
static VALUE
set_after_gc_start(VALUE module, VALUE proc)
{
return set_gc_hook(module, proc, RUBY_INTERNAL_EVENT_GC_START,
"__set_after_gc_start_tpval__", "__set_after_gc_start_proc__");
}
void
Init_gc_hook(VALUE module)
{
rb_define_module_function(module, "after_gc_start_hook=", set_after_gc_start, 1);
}
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