4 ** See Copyright Notice in mruby.h
8 #include <mruby/class.h>
9 #include <mruby/proc.h>
10 #include <mruby/opcode.h>
11 #include <mruby/data.h>
13 static const mrb_code call_iseq[] = {
18 mrb_proc_new(mrb_state *mrb, mrb_irep *irep)
21 mrb_callinfo *ci = mrb->c->ci;
23 p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
25 struct RClass *tc = NULL;
28 tc = MRB_PROC_TARGET_CLASS(ci->proc);
31 tc = ci->target_class;
34 p->e.target_class = tc;
37 mrb_irep_incref(mrb, irep);
43 env_new(mrb_state *mrb, mrb_int nlocals)
46 mrb_callinfo *ci = mrb->c->ci;
49 e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, NULL);
50 MRB_ENV_SET_LEN(e, nlocals);
52 if (ci->argc < 0) bidx = 2;
54 MRB_ENV_SET_BIDX(e, bidx);
56 e->stack = mrb->c->stack;
63 closure_setup(mrb_state *mrb, struct RProc *p)
65 mrb_callinfo *ci = mrb->c->ci;
66 struct RProc *up = p->upper;
67 struct REnv *e = NULL;
73 struct RClass *tc = MRB_PROC_TARGET_CLASS(p);
75 e = env_new(mrb, up->body.irep->nlocals);
79 mrb_field_write_barrier(mrb, (struct RBasic*)e, (struct RBasic*)tc);
81 if (MRB_PROC_ENV_P(up) && MRB_PROC_ENV(up)->cxt == NULL) {
82 e->mid = MRB_PROC_ENV(up)->mid;
87 p->flags |= MRB_PROC_ENVSET;
88 mrb_field_write_barrier(mrb, (struct RBasic*)p, (struct RBasic*)e);
93 mrb_closure_new(mrb_state *mrb, mrb_irep *irep)
95 struct RProc *p = mrb_proc_new(mrb, irep);
97 closure_setup(mrb, p);
101 MRB_API struct RProc*
102 mrb_proc_new_cfunc(mrb_state *mrb, mrb_func_t func)
106 p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
108 p->flags |= MRB_PROC_CFUNC_FL;
110 p->e.target_class = 0;
115 MRB_API struct RProc*
116 mrb_proc_new_cfunc_with_env(mrb_state *mrb, mrb_func_t func, mrb_int argc, const mrb_value *argv)
118 struct RProc *p = mrb_proc_new_cfunc(mrb, func);
122 p->e.env = e = env_new(mrb, argc);
123 p->flags |= MRB_PROC_ENVSET;
124 mrb_field_write_barrier(mrb, (struct RBasic*)p, (struct RBasic*)e);
127 /* NOTE: Prevents keeping invalid addresses when NoMemoryError is raised from `mrb_malloc()`. */
129 MRB_ENV_SET_LEN(e, 0);
131 e->stack = (mrb_value*)mrb_malloc(mrb, sizeof(mrb_value) * argc);
132 MRB_ENV_SET_LEN(e, argc);
135 for (i = 0; i < argc; ++i) {
136 e->stack[i] = argv[i];
140 for (i = 0; i < argc; ++i) {
141 SET_NIL_VALUE(e->stack[i]);
147 MRB_API struct RProc*
148 mrb_closure_new_cfunc(mrb_state *mrb, mrb_func_t func, int nlocals)
150 return mrb_proc_new_cfunc_with_env(mrb, func, nlocals, NULL);
154 mrb_proc_cfunc_env_get(mrb_state *mrb, mrb_int idx)
156 struct RProc *p = mrb->c->ci->proc;
159 if (!p || !MRB_PROC_CFUNC_P(p)) {
160 mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from non-cfunc proc.");
164 mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from cfunc Proc without REnv.");
166 if (idx < 0 || MRB_ENV_LEN(e) <= idx) {
167 mrb_raisef(mrb, E_INDEX_ERROR, "Env index out of range: %i (expected: 0 <= index < %i)",
168 idx, MRB_ENV_LEN(e));
171 return e->stack[idx];
175 mrb_proc_copy(struct RProc *a, struct RProc *b)
178 /* already initialized proc */
183 if (!MRB_PROC_CFUNC_P(a) && a->body.irep) {
184 a->body.irep->refcnt++;
188 /* a->e.target_class = a->e.target_class; */
192 mrb_proc_s_new(mrb_state *mrb, mrb_value proc_class)
198 /* Calling Proc.new without a block is not implemented yet */
199 mrb_get_args(mrb, "&!", &blk);
200 p = (struct RProc *)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb_class_ptr(proc_class));
201 mrb_proc_copy(p, mrb_proc_ptr(blk));
202 proc = mrb_obj_value(p);
203 mrb_funcall_with_block(mrb, proc, mrb_intern_lit(mrb, "initialize"), 0, NULL, proc);
204 if (!MRB_PROC_STRICT_P(p) &&
205 mrb->c->ci > mrb->c->cibase && MRB_PROC_ENV(p) == mrb->c->ci[-1].env) {
206 p->flags |= MRB_PROC_ORPHAN;
212 mrb_proc_init_copy(mrb_state *mrb, mrb_value self)
214 mrb_value proc = mrb_get_arg1(mrb);
216 if (!mrb_proc_p(proc)) {
217 mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
219 mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(proc));
225 proc_arity(mrb_state *mrb, mrb_value self)
227 return mrb_fixnum_value(mrb_proc_arity(mrb_proc_ptr(self)));
234 * lambda { |...| block } -> a_proc
236 * Equivalent to <code>Proc.new</code>, except the resulting Proc objects
237 * check the number of parameters passed when called.
240 proc_lambda(mrb_state *mrb, mrb_value self)
245 mrb_get_args(mrb, "&", &blk);
246 if (mrb_nil_p(blk)) {
247 mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
249 if (!mrb_proc_p(blk)) {
250 mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
252 p = mrb_proc_ptr(blk);
253 if (!MRB_PROC_STRICT_P(p)) {
254 struct RProc *p2 = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, p->c);
255 mrb_proc_copy(p2, p);
256 p2->flags |= MRB_PROC_STRICT;
257 return mrb_obj_value(p2);
263 mrb_proc_arity(const struct RProc *p)
265 struct mrb_irep *irep;
268 int ma, op, ra, pa, arity;
270 if (MRB_PROC_CFUNC_P(p)) {
271 /* TODO cfunc aspec not implemented yet */
281 /* arity is depend on OP_ENTER */
282 if (*pc != OP_ENTER) {
286 aspec = PEEK_W(pc+1);
287 ma = MRB_ASPEC_REQ(aspec);
288 op = MRB_ASPEC_OPT(aspec);
289 ra = MRB_ASPEC_REST(aspec);
290 pa = MRB_ASPEC_POST(aspec);
291 arity = ra || (MRB_PROC_STRICT_P(p) && op) ? -(ma + pa + 1) : ma + pa;
297 tempirep_free(mrb_state *mrb, void *p)
299 if (p) mrb_irep_free(mrb, (mrb_irep *)p);
302 static const mrb_data_type tempirep_type = { "temporary irep", tempirep_free };
305 mrb_init_proc(mrb_state *mrb)
309 struct RData *irep_obj = mrb_data_object_alloc(mrb, mrb->object_class, NULL, &tempirep_type);
311 static const mrb_irep mrb_irep_zero = { 0 };
313 call_irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
314 irep_obj->data = call_irep;
315 *call_irep = mrb_irep_zero;
316 call_irep->flags = MRB_ISEQ_NO_FREE;
317 call_irep->iseq = call_iseq;
319 call_irep->nregs = 2; /* receiver and block */
321 mrb_define_class_method(mrb, mrb->proc_class, "new", mrb_proc_s_new, MRB_ARGS_NONE()|MRB_ARGS_BLOCK());
322 mrb_define_method(mrb, mrb->proc_class, "initialize_copy", mrb_proc_init_copy, MRB_ARGS_REQ(1));
323 mrb_define_method(mrb, mrb->proc_class, "arity", proc_arity, MRB_ARGS_NONE());
325 p = mrb_proc_new(mrb, call_irep);
326 irep_obj->data = NULL;
327 MRB_METHOD_FROM_PROC(m, p);
328 mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "call"), m);
329 mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "[]"), m);
331 mrb_define_class_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()|MRB_ARGS_BLOCK()); /* 15.3.1.2.6 */
332 mrb_define_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()|MRB_ARGS_BLOCK()); /* 15.3.1.3.27 */