moonbridge

annotate moonbridge_io.c @ 94:de3982f17d05

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Removed timeout option from socket:close(); Simulate shutdown for local sockets (Unix Domain Sockets)
author jbe
date Tue Apr 07 22:17:13 2015 +0200 (2015-04-07)
parents 111b2469b753
children 719f83c7fea4
rev   line source
jbe@79 1
jbe@79 2 #include <stdlib.h>
jbe@79 3 #include <unistd.h>
jbe@79 4 #include <stdint.h>
jbe@79 5 #include <errno.h>
jbe@79 6 #include <string.h>
jbe@79 7 #include <sys/socket.h>
jbe@79 8 #include <sys/select.h>
jbe@81 9 #include <fcntl.h>
jbe@79 10
jbe@79 11 #include <lua.h>
jbe@79 12 #include <lauxlib.h>
jbe@79 13 #include <lualib.h>
jbe@79 14
jbe@80 15 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 16 #define MOONBR_IO_READBUFLEN 4096
jbe@80 17 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 18
jbe@80 19 #define moonbr_io_errmsg() \
jbe@80 20 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 21 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 22
jbe@79 23 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 24 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@79 25
jbe@79 26 typedef struct {
jbe@79 27 int fd;
jbe@94 28 int useshutdown;
jbe@94 29 int finished;
jbe@94 30 int closed;
jbe@81 31 int nonblocking;
jbe@85 32 int readerr;
jbe@85 33 int readbufcnt;
jbe@81 34 int writeerr;
jbe@83 35 size_t writeleft;
jbe@83 36 #if LUA_VERSION_NUM >= 503
jbe@83 37 lua_Integer writeqin;
jbe@83 38 lua_Integer writeqout;
jbe@83 39 #else
jbe@83 40 int writeqin;
jbe@83 41 int writeqout;
jbe@83 42 #endif
jbe@83 43 size_t writeqoff;
jbe@81 44 int writebufcnt;
jbe@85 45 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 46 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 47 } moonbr_io_handle_t;
jbe@79 48
jbe@81 49 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@81 50 if (handle->nonblocking != nonblocking) {
jbe@81 51 int flags;
jbe@81 52 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@81 53 if (flags == -1) {
jbe@81 54 moonbr_io_errmsg();
jbe@81 55 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 56 }
jbe@81 57 if (nonblocking) flags |= O_NONBLOCK;
jbe@81 58 else flags &= ~O_NONBLOCK;
jbe@81 59 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@81 60 moonbr_io_errmsg();
jbe@81 61 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 62 }
jbe@81 63 }
jbe@81 64 }
jbe@81 65
jbe@87 66 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 67 struct linger lingerval = { 0, };
jbe@94 68 if (!handle->useshutdown) return;
jbe@87 69 if (timeout >= 0) {
jbe@87 70 lingerval.l_onoff = 1;
jbe@87 71 lingerval.l_linger = timeout;
jbe@87 72 }
jbe@87 73 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 74 moonbr_io_errmsg();
jbe@87 75 luaL_error(L, "Unexpected error in setsockopt call: %s", errmsg);
jbe@87 76 }
jbe@87 77 }
jbe@87 78
jbe@86 79 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 80 moonbr_io_handle_t *handle;
jbe@85 81 lua_Integer maxread;
jbe@85 82 const char *terminatorstr;
jbe@85 83 size_t terminatorlen;
jbe@85 84 char terminator;
jbe@85 85 luaL_Buffer luabuf;
jbe@85 86 size_t luabufcnt = 0;
jbe@86 87 int endcnt;
jbe@85 88 char *terminatorpos;
jbe@85 89 ssize_t result;
jbe@85 90 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 91 maxread = luaL_optinteger(L, 2, 0);
jbe@85 92 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 93 if (terminatorlen) {
jbe@85 94 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 95 terminator = terminatorstr[0];
jbe@85 96 }
jbe@86 97 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 98 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@94 99 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 100 if (handle->readerr) {
jbe@85 101 lua_pushnil(L);
jbe@85 102 lua_pushliteral(L, "Previous read error");
jbe@85 103 return 2;
jbe@85 104 }
jbe@85 105 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 106 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 107 while (1) {
jbe@86 108 endcnt = -1;
jbe@85 109 if (maxread > 0 && handle->readbufcnt >= maxread - luabufcnt) {
jbe@86 110 endcnt = maxread - luabufcnt;
jbe@85 111 } else if (terminatorlen) {
jbe@85 112 terminatorpos = memchr(handle->readbuf, terminator, handle->readbufcnt);
jbe@86 113 if (terminatorpos) endcnt = 1 + (terminatorpos - handle->readbuf);
jbe@85 114 }
jbe@86 115 if (endcnt >= 0) {
jbe@86 116 if (!drain) {
jbe@86 117 luaL_addlstring(&luabuf, handle->readbuf, endcnt);
jbe@86 118 luaL_pushresult(&luabuf);
jbe@90 119 } else {
jbe@90 120 luabufcnt += handle->readbufcnt;
jbe@90 121 lua_pushinteger(L, luabufcnt);
jbe@86 122 }
jbe@86 123 handle->readbufcnt -= endcnt;
jbe@86 124 memmove(handle->readbuf, handle->readbuf + endcnt, handle->readbufcnt);
jbe@85 125 return 1;
jbe@85 126 }
jbe@86 127 if (!drain) luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@85 128 luabufcnt += handle->readbufcnt;
jbe@85 129 handle->readbufcnt = 0;
jbe@85 130 do {
jbe@85 131 result = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@85 132 } while (result < 0 && (errno == EINTR));
jbe@85 133 if (result == 0 || (nonblocking && result < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))) break;
jbe@85 134 if (result < 0) {
jbe@85 135 moonbr_io_errmsg();
jbe@85 136 handle->readerr = 1;
jbe@85 137 lua_pushnil(L);
jbe@85 138 lua_pushstring(L, errmsg);
jbe@85 139 return 2;
jbe@85 140 }
jbe@85 141 handle->readbufcnt += result;
jbe@85 142 }
jbe@86 143 if (!drain) {
jbe@86 144 luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@86 145 luaL_pushresult(&luabuf);
jbe@86 146 }
jbe@90 147 luabufcnt += handle->readbufcnt;
jbe@85 148 handle->readbufcnt = 0;
jbe@90 149 if (!drain) {
jbe@90 150 if (!luabufcnt && result == 0) {
jbe@94 151 moonbr_io_read_impl_eof:
jbe@90 152 lua_pushboolean(L, 0);
jbe@90 153 lua_pushliteral(L, "End of file");
jbe@90 154 return 2;
jbe@90 155 }
jbe@90 156 } else {
jbe@90 157 if (!luabufcnt && result == 0) lua_pushboolean(L, 1);
jbe@90 158 else lua_pushboolean(L, luabufcnt);
jbe@90 159 }
jbe@85 160 return 1;
jbe@85 161 }
jbe@85 162
jbe@85 163 static int moonbr_io_read(lua_State *L) {
jbe@86 164 return moonbr_io_read_impl(L, 0, 0);
jbe@85 165 }
jbe@85 166
jbe@85 167 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 168 return moonbr_io_read_impl(L, 1, 0);
jbe@86 169 }
jbe@86 170
jbe@86 171 static int moonbr_io_drain(lua_State *L) {
jbe@86 172 return moonbr_io_read_impl(L, 0, 1);
jbe@86 173 }
jbe@86 174
jbe@86 175 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 176 return moonbr_io_read_impl(L, 1, 1);
jbe@85 177 }
jbe@85 178
jbe@81 179 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 180 moonbr_io_handle_t *handle;
jbe@80 181 int i, top;
jbe@80 182 const char *str;
jbe@92 183 size_t strlen;
jbe@80 184 size_t written;
jbe@80 185 ssize_t result;
jbe@80 186 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 187 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 188 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 189 if (handle->writeerr) {
jbe@80 190 lua_pushnil(L);
jbe@80 191 lua_pushliteral(L, "Previous write error");
jbe@80 192 return 2;
jbe@80 193 }
jbe@81 194 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 195 top = lua_gettop(L);
jbe@81 196 lua_getuservalue(L, 1);
jbe@81 197 lua_getfield(L, -1, "writebuf");
jbe@84 198 for (i=2; i<=top; i++) {
jbe@84 199 luaL_checklstring(L, i, &strlen);
jbe@84 200 lua_pushvalue(L, i);
jbe@84 201 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 202 handle->writeleft += strlen;
jbe@81 203 }
jbe@83 204 while (handle->writeqout != handle->writeqin) {
jbe@83 205 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 206 str = lua_tolstring(L, -1, &strlen);
jbe@92 207 while (handle->writeqoff < strlen) {
jbe@92 208 if (strlen - handle->writeqoff < MOONBR_IO_WRITEBUFLEN - handle->writebufcnt) {
jbe@92 209 memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, strlen - handle->writeqoff);
jbe@92 210 handle->writebufcnt += strlen - handle->writeqoff;
jbe@80 211 break;
jbe@80 212 } else {
jbe@80 213 written = 0;
jbe@92 214 memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, MOONBR_IO_WRITEBUFLEN - handle->writebufcnt);
jbe@92 215 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufcnt;
jbe@80 216 while (written < MOONBR_IO_WRITEBUFLEN) {
jbe@80 217 result = write(handle->fd, handle->writebuf + written, MOONBR_IO_WRITEBUFLEN - written);
jbe@80 218 if (result < 0) {
jbe@81 219 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 220 if (written) {
jbe@81 221 handle->writebufcnt -= written;
jbe@81 222 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@92 223 goto moonbr_io_write_impl_continue;
jbe@81 224 }
jbe@81 225 goto moonbr_io_write_impl_block;
jbe@81 226 } else if (errno != EINTR) {
jbe@80 227 moonbr_io_errmsg();
jbe@81 228 handle->writeerr = 1;
jbe@80 229 lua_pushnil(L);
jbe@80 230 lua_pushstring(L, errmsg);
jbe@80 231 return 2;
jbe@80 232 }
jbe@80 233 }
jbe@92 234 written += result;
jbe@92 235 handle->writeleft -= result;
jbe@80 236 }
jbe@81 237 handle->writebufcnt = 0;
jbe@80 238 }
jbe@92 239 moonbr_io_write_impl_continue:;
jbe@80 240 }
jbe@81 241 handle->writeqoff = 0;
jbe@81 242 lua_pop(L, 1);
jbe@81 243 lua_pushnil(L);
jbe@83 244 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 245 }
jbe@81 246 if (flush) {
jbe@81 247 written = 0;
jbe@81 248 while (written < handle->writebufcnt) {
jbe@81 249 result = write(handle->fd, handle->writebuf + written, handle->writebufcnt - written);
jbe@81 250 if (result < 0) {
jbe@81 251 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 252 if (written) {
jbe@81 253 handle->writebufcnt -= written;
jbe@81 254 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@81 255 }
jbe@81 256 goto moonbr_io_write_impl_block;
jbe@81 257 } else if (errno != EINTR) {
jbe@81 258 moonbr_io_errmsg();
jbe@81 259 handle->writeerr = -1;
jbe@81 260 lua_pushnil(L);
jbe@81 261 lua_pushstring(L, errmsg);
jbe@81 262 return 2;
jbe@81 263 }
jbe@81 264 } else {
jbe@81 265 written += result;
jbe@81 266 handle->writeleft -= result;
jbe@81 267 }
jbe@81 268 }
jbe@81 269 handle->writebufcnt = 0;
jbe@82 270 if (nonblocking) lua_pushinteger(L, 0);
jbe@81 271 } else {
jbe@91 272 if (nonblocking) lua_pushinteger(L, handle->writeleft);
jbe@81 273 }
jbe@82 274 if (!nonblocking) lua_pushvalue(L, 1);
jbe@80 275 return 1;
jbe@81 276 moonbr_io_write_impl_block:
jbe@91 277 lua_pushinteger(L, handle->writeleft);
jbe@81 278 return 1;
jbe@81 279 }
jbe@81 280
jbe@81 281 static int moonbr_io_write(lua_State *L) {
jbe@81 282 return moonbr_io_write_impl(L, 0, 0);
jbe@81 283 }
jbe@81 284
jbe@81 285 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 286 return moonbr_io_write_impl(L, 1, 0);
jbe@80 287 }
jbe@80 288
jbe@80 289 static int moonbr_io_flush(lua_State *L) {
jbe@81 290 return moonbr_io_write_impl(L, 0, 1);
jbe@81 291 }
jbe@81 292
jbe@81 293 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 294 return moonbr_io_write_impl(L, 1, 1);
jbe@80 295 }
jbe@80 296
jbe@88 297 static int moonbr_io_finish(lua_State *L) {
jbe@88 298 moonbr_io_handle_t *handle;
jbe@88 299 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 300 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 301 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 302 if (handle->writeleft) {
jbe@94 303 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 304 lua_pushvalue(L, 1);
jbe@94 305 lua_call(L, 1, 2);
jbe@94 306 if (!lua_toboolean(L, -2)) {
jbe@94 307 handle->finished = 1;
jbe@94 308 return 2;
jbe@88 309 }
jbe@94 310 }
jbe@94 311 handle->finished = 1;
jbe@94 312 if (handle->useshutdown) {
jbe@88 313 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 314 moonbr_io_errmsg();
jbe@88 315 lua_pushnil(L);
jbe@88 316 lua_pushstring(L, errmsg);
jbe@88 317 return 2;
jbe@88 318 }
jbe@94 319 } else {
jbe@94 320 if (close(handle->fd)) {
jbe@94 321 moonbr_io_errmsg();
jbe@94 322 handle->fd = -1;
jbe@94 323 lua_pushnil(L);
jbe@94 324 lua_pushstring(L, errmsg);
jbe@94 325 return 2;
jbe@94 326 }
jbe@94 327 handle->fd = -1; /* fake EOF on read */
jbe@88 328 }
jbe@88 329 lua_pushboolean(L, 1);
jbe@88 330 return 1;
jbe@88 331 }
jbe@88 332
jbe@94 333 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 334 moonbr_io_handle_t *handle;
jbe@83 335 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 336 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 337 if (!reset) {
jbe@87 338 if (handle->writeleft) {
jbe@87 339 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 340 lua_pushvalue(L, 1);
jbe@87 341 lua_call(L, 1, 2);
jbe@87 342 if (!lua_toboolean(L, -2)) {
jbe@87 343 close(handle->fd);
jbe@87 344 handle->fd = -1;
jbe@87 345 return 2;
jbe@87 346 }
jbe@83 347 }
jbe@94 348 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 349 }
jbe@94 350 if (handle->fd >= 0) {
jbe@94 351 if (close(handle->fd)) {
jbe@94 352 moonbr_io_errmsg();
jbe@94 353 handle->fd = -1;
jbe@94 354 lua_pushnil(L);
jbe@94 355 lua_pushstring(L, errmsg);
jbe@94 356 return 2;
jbe@94 357 }
jbe@83 358 }
jbe@83 359 handle->fd = -1;
jbe@83 360 lua_pushboolean(L, 1);
jbe@83 361 return 1;
jbe@84 362
jbe@83 363 }
jbe@83 364
jbe@94 365 static int moonbr_io_close(lua_State *L) {
jbe@94 366 return moonbr_io_close_impl(L, 0);
jbe@94 367 }
jbe@94 368
jbe@84 369 static int moonbr_io_reset(lua_State *L) {
jbe@94 370 return moonbr_io_close_impl(L, 1);
jbe@84 371 }
jbe@84 372
jbe@88 373 static int moonbr_io_gc(lua_State *L) {
jbe@88 374 moonbr_io_handle_t *handle;
jbe@88 375 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 376 if (handle->fd >= 0) {
jbe@88 377 lua_pushcfunction(L, moonbr_io_close);
jbe@88 378 lua_pushvalue(L, 1);
jbe@88 379 lua_pushinteger(L, 0);
jbe@88 380 lua_call(L, 2, 0);
jbe@88 381 }
jbe@88 382 return 0;
jbe@88 383 }
jbe@88 384
jbe@88 385 void moonbr_io_closehandle(lua_State *L, int idx, int timeout) {
jbe@88 386 moonbr_io_handle_t *handle;
jbe@88 387 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 388 if (handle->fd >= 0) {
jbe@88 389 lua_pushcfunction(L, moonbr_io_close);
jbe@88 390 lua_pushvalue(L, idx);
jbe@88 391 lua_pushinteger(L, timeout);
jbe@88 392 lua_call(L, 2, 0);
jbe@88 393 }
jbe@88 394 }
jbe@88 395
jbe@94 396 void moonbr_io_pushhandle(lua_State *L, int fd, int useshutdown) {
jbe@79 397 moonbr_io_handle_t *handle;
jbe@79 398 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 399 handle->fd = fd;
jbe@94 400 handle->useshutdown = useshutdown;
jbe@94 401 handle->finished = 0;
jbe@94 402 handle->closed = 0;
jbe@81 403 handle->nonblocking = -1;
jbe@85 404 handle->readerr = 0;
jbe@85 405 handle->readbufcnt = 0;
jbe@81 406 handle->writeerr = 0;
jbe@81 407 handle->writeleft = 0;
jbe@83 408 handle->writeqin = 0;
jbe@83 409 handle->writeqout = 0;
jbe@81 410 handle->writeqoff = 0;
jbe@81 411 handle->writebufcnt = 0;
jbe@87 412 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 413 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 414 lua_setmetatable(L, -2);
jbe@79 415 lua_newtable(L); // uservalue
jbe@81 416 lua_newtable(L);
jbe@81 417 lua_setfield(L, -2, "writebuf");
jbe@79 418 lua_newtable(L); // public
jbe@79 419 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 420 lua_setmetatable(L, -2);
jbe@79 421 lua_setfield(L, -2, "public");
jbe@79 422 lua_setuservalue(L, -2);
jbe@79 423 }
jbe@79 424
jbe@79 425 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 426 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 427 lua_getuservalue(L, 1);
jbe@79 428 lua_getfield(L, -1, "public");
jbe@79 429 lua_pushvalue(L, 2);
jbe@79 430 lua_gettable(L, -2);
jbe@79 431 return 1;
jbe@79 432 }
jbe@79 433
jbe@79 434 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 435 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 436 lua_getuservalue(L, 1);
jbe@79 437 lua_getfield(L, -1, "public");
jbe@79 438 lua_pushvalue(L, 2);
jbe@79 439 lua_pushvalue(L, 3);
jbe@79 440 lua_settable(L, -3);
jbe@79 441 return 0;
jbe@79 442 }
jbe@79 443
jbe@79 444 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 445 {"read", moonbr_io_read},
jbe@85 446 {"read_nb", moonbr_io_read_nb},
jbe@86 447 {"drain", moonbr_io_drain},
jbe@86 448 {"drain_nb", moonbr_io_drain_nb},
jbe@80 449 {"write", moonbr_io_write},
jbe@81 450 {"write_nb", moonbr_io_write_nb},
jbe@80 451 {"flush", moonbr_io_flush},
jbe@81 452 {"flush_nb", moonbr_io_flush_nb},
jbe@88 453 {"finish", moonbr_io_finish},
jbe@87 454 {"close", moonbr_io_close},
jbe@85 455 {"reset", moonbr_io_reset},
jbe@79 456 {NULL, NULL}
jbe@79 457 };
jbe@79 458
jbe@79 459 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 460 {"__index", moonbr_io_handleindex},
jbe@79 461 {"__newindex", moonbr_io_handlenewindex},
jbe@88 462 {"__gc", moonbr_io_gc},
jbe@79 463 {NULL, NULL}
jbe@79 464 };
jbe@79 465
jbe@79 466 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@79 467 {NULL, NULL}
jbe@79 468 };
jbe@79 469
jbe@79 470 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 471
jbe@80 472 lua_newtable(L); // module
jbe@80 473
jbe@79 474 lua_newtable(L); // public metatable
jbe@79 475 lua_newtable(L); // handle methods
jbe@79 476 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 477 lua_pushvalue(L, -1);
jbe@80 478 lua_setfield(L, -4, "handle");
jbe@79 479 lua_setfield(L, -2, "__index");
jbe@79 480 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 481
jbe@79 482 lua_newtable(L); // handle metatable
jbe@79 483 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 484 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 485
jbe@79 486 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 487 return 1;
jbe@79 488
jbe@79 489 }
jbe@79 490

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