139 lines
2.7 KiB
C
139 lines
2.7 KiB
C
/* -*-c-*- */
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/*
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* from eval.c
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*/
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#include "eval_intern.h"
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/* exit */
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void
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rb_call_end_proc(VALUE data)
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{
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rb_proc_call(data, rb_ary_new());
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}
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/*
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* call-seq:
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* at_exit { block } -> proc
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*
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* Converts _block_ to a +Proc+ object (and therefore
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* binds it at the point of call) and registers it for execution when
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* the program exits. If multiple handlers are registered, they are
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* executed in reverse order of registration.
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*
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* def do_at_exit(str1)
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* at_exit { print str1 }
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* end
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* at_exit { puts "cruel world" }
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* do_at_exit("goodbye ")
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* exit
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*
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* <em>produces:</em>
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*
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* goodbye cruel world
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*/
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static VALUE
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rb_f_at_exit(VALUE _)
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{
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VALUE proc;
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if (!rb_block_given_p()) {
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rb_raise(rb_eArgError, "called without a block");
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}
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proc = rb_block_proc();
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rb_set_end_proc(rb_call_end_proc, proc);
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return proc;
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}
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struct end_proc_data {
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void (*func) (VALUE);
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VALUE data;
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struct end_proc_data *next;
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};
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static struct end_proc_data *end_procs, *ephemeral_end_procs;
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void
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rb_set_end_proc(void (*func)(VALUE), VALUE data)
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{
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struct end_proc_data *link = ALLOC(struct end_proc_data);
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struct end_proc_data **list;
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rb_thread_t *th = GET_THREAD();
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if (th->top_wrapper) {
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list = &ephemeral_end_procs;
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}
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else {
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list = &end_procs;
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}
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link->next = *list;
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link->func = func;
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link->data = data;
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*list = link;
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}
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void
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rb_mark_end_proc(void)
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{
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struct end_proc_data *link;
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link = end_procs;
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while (link) {
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rb_gc_mark(link->data);
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link = link->next;
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}
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link = ephemeral_end_procs;
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while (link) {
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rb_gc_mark(link->data);
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link = link->next;
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}
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}
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static void
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exec_end_procs_chain(struct end_proc_data *volatile *procs, VALUE *errp)
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{
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struct end_proc_data volatile endproc;
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struct end_proc_data *link;
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VALUE errinfo = *errp;
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while ((link = *procs) != 0) {
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*procs = link->next;
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endproc = *link;
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xfree(link);
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(*endproc.func) (endproc.data);
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*errp = errinfo;
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}
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}
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static void
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rb_ec_exec_end_proc(rb_execution_context_t * ec)
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{
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enum ruby_tag_type state;
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volatile VALUE errinfo = ec->errinfo;
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EC_PUSH_TAG(ec);
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if ((state = EC_EXEC_TAG()) == TAG_NONE) {
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again:
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exec_end_procs_chain(&ephemeral_end_procs, &ec->errinfo);
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exec_end_procs_chain(&end_procs, &ec->errinfo);
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}
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else {
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EC_TMPPOP_TAG();
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error_handle(ec, state);
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if (!NIL_P(ec->errinfo)) errinfo = ec->errinfo;
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EC_REPUSH_TAG();
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goto again;
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}
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EC_POP_TAG();
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ec->errinfo = errinfo;
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}
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void
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Init_jump(void)
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{
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rb_define_global_function("at_exit", rb_f_at_exit, 0);
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}
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