[270] | 1 | /*
|
---|
| 2 | ** proc.c - Proc class
|
---|
| 3 | **
|
---|
| 4 | ** See Copyright Notice in mruby.h
|
---|
| 5 | */
|
---|
| 6 |
|
---|
| 7 | #include "mruby.h"
|
---|
| 8 | #include "mruby/class.h"
|
---|
| 9 | #include "mruby/proc.h"
|
---|
| 10 | #include "mruby/opcode.h"
|
---|
| 11 |
|
---|
| 12 | static mrb_code call_iseq[] = {
|
---|
| 13 | MKOP_A(OP_CALL, 0),
|
---|
| 14 | };
|
---|
| 15 |
|
---|
| 16 | struct RProc *
|
---|
| 17 | mrb_proc_new(mrb_state *mrb, mrb_irep *irep)
|
---|
| 18 | {
|
---|
| 19 | struct RProc *p;
|
---|
| 20 | mrb_callinfo *ci = mrb->c->ci;
|
---|
| 21 |
|
---|
| 22 | p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
|
---|
| 23 | p->target_class = 0;
|
---|
| 24 | if (ci) {
|
---|
| 25 | if (ci->proc)
|
---|
| 26 | p->target_class = ci->proc->target_class;
|
---|
| 27 | if (!p->target_class)
|
---|
| 28 | p->target_class = ci->target_class;
|
---|
| 29 | }
|
---|
| 30 | p->body.irep = irep;
|
---|
| 31 | p->env = 0;
|
---|
| 32 | mrb_irep_incref(mrb, irep);
|
---|
| 33 |
|
---|
| 34 | return p;
|
---|
| 35 | }
|
---|
| 36 |
|
---|
| 37 | static struct REnv*
|
---|
| 38 | env_new(mrb_state *mrb, int nlocals)
|
---|
| 39 | {
|
---|
| 40 | struct REnv *e;
|
---|
| 41 |
|
---|
| 42 | e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, (struct RClass*)mrb->c->ci->proc->env);
|
---|
| 43 | MRB_SET_ENV_STACK_LEN(e, nlocals);
|
---|
| 44 | e->mid = mrb->c->ci->mid;
|
---|
| 45 | e->cioff = mrb->c->ci - mrb->c->cibase;
|
---|
| 46 | e->stack = mrb->c->stack;
|
---|
| 47 |
|
---|
| 48 | return e;
|
---|
| 49 | }
|
---|
| 50 |
|
---|
| 51 | static void
|
---|
| 52 | closure_setup(mrb_state *mrb, struct RProc *p, int nlocals)
|
---|
| 53 | {
|
---|
| 54 | struct REnv *e;
|
---|
| 55 |
|
---|
| 56 | if (!mrb->c->ci->env) {
|
---|
| 57 | e = env_new(mrb, nlocals);
|
---|
| 58 | mrb->c->ci->env = e;
|
---|
| 59 | }
|
---|
| 60 | else {
|
---|
| 61 | e = mrb->c->ci->env;
|
---|
| 62 | }
|
---|
| 63 | p->env = e;
|
---|
| 64 | }
|
---|
| 65 |
|
---|
| 66 | struct RProc *
|
---|
| 67 | mrb_closure_new(mrb_state *mrb, mrb_irep *irep)
|
---|
| 68 | {
|
---|
| 69 | struct RProc *p = mrb_proc_new(mrb, irep);
|
---|
| 70 |
|
---|
| 71 | closure_setup(mrb, p, mrb->c->ci->proc->body.irep->nlocals);
|
---|
| 72 | return p;
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | MRB_API struct RProc *
|
---|
| 76 | mrb_proc_new_cfunc(mrb_state *mrb, mrb_func_t func)
|
---|
| 77 | {
|
---|
| 78 | struct RProc *p;
|
---|
| 79 |
|
---|
| 80 | p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
|
---|
| 81 | p->body.func = func;
|
---|
| 82 | p->flags |= MRB_PROC_CFUNC;
|
---|
| 83 | p->env = 0;
|
---|
| 84 |
|
---|
| 85 | return p;
|
---|
| 86 | }
|
---|
| 87 |
|
---|
| 88 | MRB_API struct RProc *
|
---|
| 89 | mrb_proc_new_cfunc_with_env(mrb_state *mrb, mrb_func_t func, mrb_int argc, const mrb_value *argv)
|
---|
| 90 | {
|
---|
| 91 | struct RProc *p = mrb_proc_new_cfunc(mrb, func);
|
---|
| 92 | struct REnv *e;
|
---|
| 93 | int i;
|
---|
| 94 |
|
---|
| 95 | p->env = e = env_new(mrb, argc);
|
---|
| 96 | mrb_field_write_barrier(mrb, (struct RBasic *)p, (struct RBasic *)p->env);
|
---|
| 97 | MRB_ENV_UNSHARE_STACK(e);
|
---|
| 98 | e->stack = (mrb_value*)mrb_malloc(mrb, sizeof(mrb_value) * argc);
|
---|
| 99 | if (argv) {
|
---|
| 100 | for (i = 0; i < argc; ++i) {
|
---|
| 101 | e->stack[i] = argv[i];
|
---|
| 102 | }
|
---|
| 103 | }
|
---|
| 104 | else {
|
---|
| 105 | for (i = 0; i < argc; ++i) {
|
---|
| 106 | SET_NIL_VALUE(e->stack[i]);
|
---|
| 107 | }
|
---|
| 108 | }
|
---|
| 109 | return p;
|
---|
| 110 | }
|
---|
| 111 |
|
---|
| 112 | MRB_API struct RProc *
|
---|
| 113 | mrb_closure_new_cfunc(mrb_state *mrb, mrb_func_t func, int nlocals)
|
---|
| 114 | {
|
---|
| 115 | return mrb_proc_new_cfunc_with_env(mrb, func, nlocals, NULL);
|
---|
| 116 | }
|
---|
| 117 |
|
---|
| 118 | MRB_API mrb_value
|
---|
| 119 | mrb_proc_cfunc_env_get(mrb_state *mrb, mrb_int idx)
|
---|
| 120 | {
|
---|
| 121 | struct RProc *p = mrb->c->ci->proc;
|
---|
| 122 | struct REnv *e = p->env;
|
---|
| 123 |
|
---|
| 124 | if (!MRB_PROC_CFUNC_P(p)) {
|
---|
| 125 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from non-cfunc proc.");
|
---|
| 126 | }
|
---|
| 127 | if (!e) {
|
---|
| 128 | mrb_raise(mrb, E_TYPE_ERROR, "Can't get cfunc env from cfunc Proc without REnv.");
|
---|
| 129 | }
|
---|
| 130 | if (idx < 0 || MRB_ENV_STACK_LEN(e) <= idx) {
|
---|
| 131 | mrb_raisef(mrb, E_INDEX_ERROR, "Env index out of range: %S (expected: 0 <= index < %S)",
|
---|
| 132 | mrb_fixnum_value(idx), mrb_fixnum_value(MRB_ENV_STACK_LEN(e)));
|
---|
| 133 | }
|
---|
| 134 |
|
---|
| 135 | return e->stack[idx];
|
---|
| 136 | }
|
---|
| 137 |
|
---|
| 138 | MRB_API void
|
---|
| 139 | mrb_proc_copy(struct RProc *a, struct RProc *b)
|
---|
| 140 | {
|
---|
| 141 | a->flags = b->flags;
|
---|
| 142 | a->body = b->body;
|
---|
| 143 | if (!MRB_PROC_CFUNC_P(a)) {
|
---|
| 144 | a->body.irep->refcnt++;
|
---|
| 145 | }
|
---|
| 146 | a->target_class = b->target_class;
|
---|
| 147 | a->env = b->env;
|
---|
| 148 | }
|
---|
| 149 |
|
---|
| 150 | static mrb_value
|
---|
| 151 | mrb_proc_initialize(mrb_state *mrb, mrb_value self)
|
---|
| 152 | {
|
---|
| 153 | mrb_value blk;
|
---|
| 154 |
|
---|
| 155 | mrb_get_args(mrb, "&", &blk);
|
---|
| 156 | if (mrb_nil_p(blk)) {
|
---|
| 157 | /* Calling Proc.new without a block is not implemented yet */
|
---|
| 158 | mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
|
---|
| 159 | }
|
---|
| 160 | else {
|
---|
| 161 | mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(blk));
|
---|
| 162 | }
|
---|
| 163 | return self;
|
---|
| 164 | }
|
---|
| 165 |
|
---|
| 166 | static mrb_value
|
---|
| 167 | mrb_proc_init_copy(mrb_state *mrb, mrb_value self)
|
---|
| 168 | {
|
---|
| 169 | mrb_value proc;
|
---|
| 170 |
|
---|
| 171 | mrb_get_args(mrb, "o", &proc);
|
---|
| 172 | if (mrb_type(proc) != MRB_TT_PROC) {
|
---|
| 173 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
|
---|
| 174 | }
|
---|
| 175 | mrb_proc_copy(mrb_proc_ptr(self), mrb_proc_ptr(proc));
|
---|
| 176 | return self;
|
---|
| 177 | }
|
---|
| 178 |
|
---|
| 179 | int
|
---|
| 180 | mrb_proc_cfunc_p(struct RProc *p)
|
---|
| 181 | {
|
---|
| 182 | return MRB_PROC_CFUNC_P(p);
|
---|
| 183 | }
|
---|
| 184 |
|
---|
| 185 | mrb_value
|
---|
| 186 | mrb_proc_call_cfunc(mrb_state *mrb, struct RProc *p, mrb_value self)
|
---|
| 187 | {
|
---|
| 188 | return (p->body.func)(mrb, self);
|
---|
| 189 | }
|
---|
| 190 |
|
---|
| 191 | mrb_code*
|
---|
| 192 | mrb_proc_iseq(mrb_state *mrb, struct RProc *p)
|
---|
| 193 | {
|
---|
| 194 | return p->body.irep->iseq;
|
---|
| 195 | }
|
---|
| 196 |
|
---|
| 197 | /* 15.2.17.4.2 */
|
---|
| 198 | static mrb_value
|
---|
| 199 | mrb_proc_arity(mrb_state *mrb, mrb_value self)
|
---|
| 200 | {
|
---|
| 201 | struct RProc *p = mrb_proc_ptr(self);
|
---|
| 202 | mrb_code *iseq = mrb_proc_iseq(mrb, p);
|
---|
| 203 | mrb_aspec aspec;
|
---|
| 204 | int ma, op, ra, pa, arity;
|
---|
| 205 |
|
---|
| 206 | if (MRB_PROC_CFUNC_P(p)) {
|
---|
| 207 | /* TODO cfunc aspec not implemented yet */
|
---|
| 208 | return mrb_fixnum_value(-1);
|
---|
| 209 | }
|
---|
| 210 |
|
---|
| 211 | /* arity is depend on OP_ENTER */
|
---|
| 212 | if (GET_OPCODE(*iseq) != OP_ENTER) {
|
---|
| 213 | return mrb_fixnum_value(0);
|
---|
| 214 | }
|
---|
| 215 |
|
---|
| 216 | aspec = GETARG_Ax(*iseq);
|
---|
| 217 | ma = MRB_ASPEC_REQ(aspec);
|
---|
| 218 | op = MRB_ASPEC_OPT(aspec);
|
---|
| 219 | ra = MRB_ASPEC_REST(aspec);
|
---|
| 220 | pa = MRB_ASPEC_POST(aspec);
|
---|
| 221 | arity = ra || (MRB_PROC_STRICT_P(p) && op) ? -(ma + pa + 1) : ma + pa;
|
---|
| 222 |
|
---|
| 223 | return mrb_fixnum_value(arity);
|
---|
| 224 | }
|
---|
| 225 |
|
---|
| 226 | /* 15.3.1.2.6 */
|
---|
| 227 | /* 15.3.1.3.27 */
|
---|
| 228 | /*
|
---|
| 229 | * call-seq:
|
---|
| 230 | * lambda { |...| block } -> a_proc
|
---|
| 231 | *
|
---|
| 232 | * Equivalent to <code>Proc.new</code>, except the resulting Proc objects
|
---|
| 233 | * check the number of parameters passed when called.
|
---|
| 234 | */
|
---|
| 235 | static mrb_value
|
---|
| 236 | proc_lambda(mrb_state *mrb, mrb_value self)
|
---|
| 237 | {
|
---|
| 238 | mrb_value blk;
|
---|
| 239 | struct RProc *p;
|
---|
| 240 |
|
---|
| 241 | mrb_get_args(mrb, "&", &blk);
|
---|
| 242 | if (mrb_nil_p(blk)) {
|
---|
| 243 | mrb_raise(mrb, E_ARGUMENT_ERROR, "tried to create Proc object without a block");
|
---|
| 244 | }
|
---|
| 245 | if (mrb_type(blk) != MRB_TT_PROC) {
|
---|
| 246 | mrb_raise(mrb, E_ARGUMENT_ERROR, "not a proc");
|
---|
| 247 | }
|
---|
| 248 | p = mrb_proc_ptr(blk);
|
---|
| 249 | if (!MRB_PROC_STRICT_P(p)) {
|
---|
| 250 | struct RProc *p2 = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, p->c);
|
---|
| 251 | mrb_proc_copy(p2, p);
|
---|
| 252 | p2->flags |= MRB_PROC_STRICT;
|
---|
| 253 | return mrb_obj_value(p2);
|
---|
| 254 | }
|
---|
| 255 | return blk;
|
---|
| 256 | }
|
---|
| 257 |
|
---|
| 258 | void
|
---|
| 259 | mrb_init_proc(mrb_state *mrb)
|
---|
| 260 | {
|
---|
| 261 | struct RProc *m;
|
---|
| 262 | mrb_irep *call_irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
|
---|
| 263 | static const mrb_irep mrb_irep_zero = { 0 };
|
---|
| 264 |
|
---|
| 265 | *call_irep = mrb_irep_zero;
|
---|
| 266 | call_irep->flags = MRB_ISEQ_NO_FREE;
|
---|
| 267 | call_irep->iseq = call_iseq;
|
---|
| 268 | call_irep->ilen = 1;
|
---|
| 269 |
|
---|
| 270 | mrb_define_method(mrb, mrb->proc_class, "initialize", mrb_proc_initialize, MRB_ARGS_NONE());
|
---|
| 271 | mrb_define_method(mrb, mrb->proc_class, "initialize_copy", mrb_proc_init_copy, MRB_ARGS_REQ(1));
|
---|
| 272 | mrb_define_method(mrb, mrb->proc_class, "arity", mrb_proc_arity, MRB_ARGS_NONE());
|
---|
| 273 |
|
---|
| 274 | m = mrb_proc_new(mrb, call_irep);
|
---|
| 275 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "call"), m);
|
---|
| 276 | mrb_define_method_raw(mrb, mrb->proc_class, mrb_intern_lit(mrb, "[]"), m);
|
---|
| 277 |
|
---|
| 278 | mrb_define_class_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.2.6 */
|
---|
| 279 | mrb_define_method(mrb, mrb->kernel_module, "lambda", proc_lambda, MRB_ARGS_NONE()); /* 15.3.1.3.27 */
|
---|
| 280 | }
|
---|