moonbridge

annotate moonbridge_io.c @ 95:719f83c7fea4

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Correctly cache nonblocking status of socket in I/O library; Use TCP_NOPUSH/TCP_CORK when applicable
author jbe
date Wed Apr 08 01:12:03 2015 +0200 (2015-04-08)
parents de3982f17d05
children fdc1bb710544
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@95 10 #include <netinet/in.h>
jbe@95 11 #include <netinet/tcp.h>
jbe@79 12
jbe@79 13 #include <lua.h>
jbe@79 14 #include <lauxlib.h>
jbe@79 15 #include <lualib.h>
jbe@79 16
jbe@80 17 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 18 #define MOONBR_IO_READBUFLEN 4096
jbe@80 19 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 20
jbe@80 21 #define moonbr_io_errmsg() \
jbe@80 22 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 23 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 24
jbe@79 25 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 26 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@79 27
jbe@79 28 typedef struct {
jbe@79 29 int fd;
jbe@95 30 int isnetwork;
jbe@94 31 int finished;
jbe@94 32 int closed;
jbe@81 33 int nonblocking;
jbe@95 34 int nopush;
jbe@85 35 int readerr;
jbe@85 36 int readbufcnt;
jbe@81 37 int writeerr;
jbe@83 38 size_t writeleft;
jbe@83 39 #if LUA_VERSION_NUM >= 503
jbe@83 40 lua_Integer writeqin;
jbe@83 41 lua_Integer writeqout;
jbe@83 42 #else
jbe@83 43 int writeqin;
jbe@83 44 int writeqout;
jbe@83 45 #endif
jbe@83 46 size_t writeqoff;
jbe@81 47 int writebufcnt;
jbe@85 48 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 49 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 50 } moonbr_io_handle_t;
jbe@79 51
jbe@81 52 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 53 int flags;
jbe@95 54 if (handle->nonblocking == nonblocking) return;
jbe@95 55 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 56 if (flags == -1) {
jbe@95 57 moonbr_io_errmsg();
jbe@95 58 handle->nonblocking = -1;
jbe@95 59 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 60 }
jbe@95 61 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 62 else flags &= ~O_NONBLOCK;
jbe@95 63 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 64 moonbr_io_errmsg();
jbe@95 65 handle->nonblocking = -1;
jbe@95 66 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 67 }
jbe@95 68 handle->nonblocking = nonblocking;
jbe@81 69 }
jbe@81 70
jbe@87 71 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 72 struct linger lingerval = { 0, };
jbe@95 73 if (!handle->isnetwork) return;
jbe@87 74 if (timeout >= 0) {
jbe@87 75 lingerval.l_onoff = 1;
jbe@87 76 lingerval.l_linger = timeout;
jbe@87 77 }
jbe@87 78 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 79 moonbr_io_errmsg();
jbe@95 80 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 81 }
jbe@87 82 }
jbe@87 83
jbe@95 84 static void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@95 85 if (!handle->isnetwork || handle->nopush == nopush) return;
jbe@95 86 #if defined(TCP_CORK) && !defined(TCP_NOPUSH)
jbe@95 87 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@95 88 moonbr_io_errmsg();
jbe@95 89 handle->nopush = -1;
jbe@95 90 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@95 91 }
jbe@95 92 #else
jbe@95 93 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@95 94 moonbr_io_errmsg();
jbe@95 95 handle->nopush = -1;
jbe@95 96 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@95 97 }
jbe@95 98 #endif
jbe@95 99 handle->nopush = nopush;
jbe@95 100 }
jbe@95 101
jbe@86 102 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 103 moonbr_io_handle_t *handle;
jbe@85 104 lua_Integer maxread;
jbe@85 105 const char *terminatorstr;
jbe@85 106 size_t terminatorlen;
jbe@85 107 char terminator;
jbe@85 108 luaL_Buffer luabuf;
jbe@85 109 size_t luabufcnt = 0;
jbe@86 110 int endcnt;
jbe@85 111 char *terminatorpos;
jbe@85 112 ssize_t result;
jbe@85 113 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@85 114 maxread = luaL_optinteger(L, 2, 0);
jbe@85 115 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 116 if (terminatorlen) {
jbe@85 117 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 118 terminator = terminatorstr[0];
jbe@85 119 }
jbe@86 120 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 121 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@94 122 if (handle->fd < 0) goto moonbr_io_read_impl_eof; /* fake EOF to simulate shutdown */
jbe@85 123 if (handle->readerr) {
jbe@85 124 lua_pushnil(L);
jbe@85 125 lua_pushliteral(L, "Previous read error");
jbe@85 126 return 2;
jbe@85 127 }
jbe@85 128 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 129 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 130 while (1) {
jbe@86 131 endcnt = -1;
jbe@85 132 if (maxread > 0 && handle->readbufcnt >= maxread - luabufcnt) {
jbe@86 133 endcnt = maxread - luabufcnt;
jbe@85 134 } else if (terminatorlen) {
jbe@85 135 terminatorpos = memchr(handle->readbuf, terminator, handle->readbufcnt);
jbe@86 136 if (terminatorpos) endcnt = 1 + (terminatorpos - handle->readbuf);
jbe@85 137 }
jbe@86 138 if (endcnt >= 0) {
jbe@86 139 if (!drain) {
jbe@86 140 luaL_addlstring(&luabuf, handle->readbuf, endcnt);
jbe@86 141 luaL_pushresult(&luabuf);
jbe@90 142 } else {
jbe@90 143 luabufcnt += handle->readbufcnt;
jbe@90 144 lua_pushinteger(L, luabufcnt);
jbe@86 145 }
jbe@86 146 handle->readbufcnt -= endcnt;
jbe@86 147 memmove(handle->readbuf, handle->readbuf + endcnt, handle->readbufcnt);
jbe@85 148 return 1;
jbe@85 149 }
jbe@86 150 if (!drain) luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@85 151 luabufcnt += handle->readbufcnt;
jbe@85 152 handle->readbufcnt = 0;
jbe@85 153 do {
jbe@85 154 result = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@85 155 } while (result < 0 && (errno == EINTR));
jbe@85 156 if (result == 0 || (nonblocking && result < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))) break;
jbe@85 157 if (result < 0) {
jbe@85 158 moonbr_io_errmsg();
jbe@85 159 handle->readerr = 1;
jbe@85 160 lua_pushnil(L);
jbe@85 161 lua_pushstring(L, errmsg);
jbe@85 162 return 2;
jbe@85 163 }
jbe@85 164 handle->readbufcnt += result;
jbe@85 165 }
jbe@86 166 if (!drain) {
jbe@86 167 luaL_addlstring(&luabuf, handle->readbuf, handle->readbufcnt);
jbe@86 168 luaL_pushresult(&luabuf);
jbe@86 169 }
jbe@90 170 luabufcnt += handle->readbufcnt;
jbe@85 171 handle->readbufcnt = 0;
jbe@90 172 if (!drain) {
jbe@90 173 if (!luabufcnt && result == 0) {
jbe@94 174 moonbr_io_read_impl_eof:
jbe@90 175 lua_pushboolean(L, 0);
jbe@90 176 lua_pushliteral(L, "End of file");
jbe@90 177 return 2;
jbe@90 178 }
jbe@90 179 } else {
jbe@90 180 if (!luabufcnt && result == 0) lua_pushboolean(L, 1);
jbe@90 181 else lua_pushboolean(L, luabufcnt);
jbe@90 182 }
jbe@85 183 return 1;
jbe@85 184 }
jbe@85 185
jbe@85 186 static int moonbr_io_read(lua_State *L) {
jbe@86 187 return moonbr_io_read_impl(L, 0, 0);
jbe@85 188 }
jbe@85 189
jbe@85 190 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 191 return moonbr_io_read_impl(L, 1, 0);
jbe@86 192 }
jbe@86 193
jbe@86 194 static int moonbr_io_drain(lua_State *L) {
jbe@86 195 return moonbr_io_read_impl(L, 0, 1);
jbe@86 196 }
jbe@86 197
jbe@86 198 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 199 return moonbr_io_read_impl(L, 1, 1);
jbe@85 200 }
jbe@85 201
jbe@81 202 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 203 moonbr_io_handle_t *handle;
jbe@80 204 int i, top;
jbe@80 205 const char *str;
jbe@92 206 size_t strlen;
jbe@80 207 size_t written;
jbe@80 208 ssize_t result;
jbe@80 209 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 210 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 211 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 212 if (handle->writeerr) {
jbe@80 213 lua_pushnil(L);
jbe@80 214 lua_pushliteral(L, "Previous write error");
jbe@80 215 return 2;
jbe@80 216 }
jbe@81 217 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 218 top = lua_gettop(L);
jbe@81 219 lua_getuservalue(L, 1);
jbe@81 220 lua_getfield(L, -1, "writebuf");
jbe@84 221 for (i=2; i<=top; i++) {
jbe@84 222 luaL_checklstring(L, i, &strlen);
jbe@84 223 lua_pushvalue(L, i);
jbe@84 224 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 225 handle->writeleft += strlen;
jbe@81 226 }
jbe@83 227 while (handle->writeqout != handle->writeqin) {
jbe@83 228 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 229 str = lua_tolstring(L, -1, &strlen);
jbe@92 230 while (handle->writeqoff < strlen) {
jbe@92 231 if (strlen - handle->writeqoff < MOONBR_IO_WRITEBUFLEN - handle->writebufcnt) {
jbe@92 232 memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, strlen - handle->writeqoff);
jbe@92 233 handle->writebufcnt += strlen - handle->writeqoff;
jbe@80 234 break;
jbe@80 235 } else {
jbe@95 236 moonbr_io_handle_set_nopush(L, handle,
jbe@95 237 (flush || handle->writeleft == MOONBR_IO_WRITEBUFLEN) ?
jbe@95 238 0 : 1
jbe@95 239 );
jbe@80 240 written = 0;
jbe@92 241 memcpy(handle->writebuf + handle->writebufcnt, str + handle->writeqoff, MOONBR_IO_WRITEBUFLEN - handle->writebufcnt);
jbe@92 242 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufcnt;
jbe@80 243 while (written < MOONBR_IO_WRITEBUFLEN) {
jbe@80 244 result = write(handle->fd, handle->writebuf + written, MOONBR_IO_WRITEBUFLEN - written);
jbe@80 245 if (result < 0) {
jbe@81 246 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 247 if (written) {
jbe@81 248 handle->writebufcnt -= written;
jbe@81 249 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@92 250 goto moonbr_io_write_impl_continue;
jbe@81 251 }
jbe@81 252 goto moonbr_io_write_impl_block;
jbe@81 253 } else if (errno != EINTR) {
jbe@80 254 moonbr_io_errmsg();
jbe@81 255 handle->writeerr = 1;
jbe@80 256 lua_pushnil(L);
jbe@80 257 lua_pushstring(L, errmsg);
jbe@80 258 return 2;
jbe@80 259 }
jbe@80 260 }
jbe@92 261 written += result;
jbe@92 262 handle->writeleft -= result;
jbe@80 263 }
jbe@81 264 handle->writebufcnt = 0;
jbe@80 265 }
jbe@92 266 moonbr_io_write_impl_continue:;
jbe@80 267 }
jbe@81 268 handle->writeqoff = 0;
jbe@81 269 lua_pop(L, 1);
jbe@81 270 lua_pushnil(L);
jbe@83 271 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 272 }
jbe@81 273 if (flush) {
jbe@81 274 written = 0;
jbe@81 275 while (written < handle->writebufcnt) {
jbe@81 276 result = write(handle->fd, handle->writebuf + written, handle->writebufcnt - written);
jbe@81 277 if (result < 0) {
jbe@81 278 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 279 if (written) {
jbe@81 280 handle->writebufcnt -= written;
jbe@81 281 memmove(handle->writebuf, handle->writebuf + written, handle->writebufcnt);
jbe@81 282 }
jbe@81 283 goto moonbr_io_write_impl_block;
jbe@81 284 } else if (errno != EINTR) {
jbe@81 285 moonbr_io_errmsg();
jbe@81 286 handle->writeerr = -1;
jbe@81 287 lua_pushnil(L);
jbe@81 288 lua_pushstring(L, errmsg);
jbe@81 289 return 2;
jbe@81 290 }
jbe@81 291 } else {
jbe@81 292 written += result;
jbe@81 293 handle->writeleft -= result;
jbe@81 294 }
jbe@81 295 }
jbe@81 296 handle->writebufcnt = 0;
jbe@82 297 if (nonblocking) lua_pushinteger(L, 0);
jbe@81 298 } else {
jbe@91 299 if (nonblocking) lua_pushinteger(L, handle->writeleft);
jbe@81 300 }
jbe@82 301 if (!nonblocking) lua_pushvalue(L, 1);
jbe@80 302 return 1;
jbe@81 303 moonbr_io_write_impl_block:
jbe@91 304 lua_pushinteger(L, handle->writeleft);
jbe@81 305 return 1;
jbe@81 306 }
jbe@81 307
jbe@81 308 static int moonbr_io_write(lua_State *L) {
jbe@81 309 return moonbr_io_write_impl(L, 0, 0);
jbe@81 310 }
jbe@81 311
jbe@81 312 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 313 return moonbr_io_write_impl(L, 1, 0);
jbe@80 314 }
jbe@80 315
jbe@80 316 static int moonbr_io_flush(lua_State *L) {
jbe@81 317 return moonbr_io_write_impl(L, 0, 1);
jbe@81 318 }
jbe@81 319
jbe@81 320 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 321 return moonbr_io_write_impl(L, 1, 1);
jbe@80 322 }
jbe@80 323
jbe@88 324 static int moonbr_io_finish(lua_State *L) {
jbe@88 325 moonbr_io_handle_t *handle;
jbe@88 326 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 327 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 328 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 329 if (handle->writeleft) {
jbe@94 330 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 331 lua_pushvalue(L, 1);
jbe@94 332 lua_call(L, 1, 2);
jbe@94 333 if (!lua_toboolean(L, -2)) {
jbe@94 334 handle->finished = 1;
jbe@94 335 return 2;
jbe@88 336 }
jbe@94 337 }
jbe@94 338 handle->finished = 1;
jbe@95 339 if (handle->isnetwork) {
jbe@88 340 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 341 moonbr_io_errmsg();
jbe@88 342 lua_pushnil(L);
jbe@88 343 lua_pushstring(L, errmsg);
jbe@88 344 return 2;
jbe@88 345 }
jbe@94 346 } else {
jbe@94 347 if (close(handle->fd)) {
jbe@94 348 moonbr_io_errmsg();
jbe@94 349 handle->fd = -1;
jbe@94 350 lua_pushnil(L);
jbe@94 351 lua_pushstring(L, errmsg);
jbe@94 352 return 2;
jbe@94 353 }
jbe@94 354 handle->fd = -1; /* fake EOF on read */
jbe@88 355 }
jbe@88 356 lua_pushboolean(L, 1);
jbe@88 357 return 1;
jbe@88 358 }
jbe@88 359
jbe@94 360 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 361 moonbr_io_handle_t *handle;
jbe@83 362 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 363 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 364 if (!reset) {
jbe@87 365 if (handle->writeleft) {
jbe@87 366 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 367 lua_pushvalue(L, 1);
jbe@87 368 lua_call(L, 1, 2);
jbe@87 369 if (!lua_toboolean(L, -2)) {
jbe@87 370 close(handle->fd);
jbe@87 371 handle->fd = -1;
jbe@87 372 return 2;
jbe@87 373 }
jbe@83 374 }
jbe@94 375 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 376 }
jbe@94 377 if (handle->fd >= 0) {
jbe@94 378 if (close(handle->fd)) {
jbe@94 379 moonbr_io_errmsg();
jbe@94 380 handle->fd = -1;
jbe@94 381 lua_pushnil(L);
jbe@94 382 lua_pushstring(L, errmsg);
jbe@94 383 return 2;
jbe@94 384 }
jbe@83 385 }
jbe@83 386 handle->fd = -1;
jbe@83 387 lua_pushboolean(L, 1);
jbe@83 388 return 1;
jbe@84 389
jbe@83 390 }
jbe@83 391
jbe@94 392 static int moonbr_io_close(lua_State *L) {
jbe@94 393 return moonbr_io_close_impl(L, 0);
jbe@94 394 }
jbe@94 395
jbe@84 396 static int moonbr_io_reset(lua_State *L) {
jbe@94 397 return moonbr_io_close_impl(L, 1);
jbe@84 398 }
jbe@84 399
jbe@88 400 static int moonbr_io_gc(lua_State *L) {
jbe@88 401 moonbr_io_handle_t *handle;
jbe@88 402 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 403 if (handle->fd >= 0) {
jbe@88 404 lua_pushcfunction(L, moonbr_io_close);
jbe@88 405 lua_pushvalue(L, 1);
jbe@88 406 lua_pushinteger(L, 0);
jbe@88 407 lua_call(L, 2, 0);
jbe@88 408 }
jbe@88 409 return 0;
jbe@88 410 }
jbe@88 411
jbe@88 412 void moonbr_io_closehandle(lua_State *L, int idx, int timeout) {
jbe@88 413 moonbr_io_handle_t *handle;
jbe@88 414 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 415 if (handle->fd >= 0) {
jbe@88 416 lua_pushcfunction(L, moonbr_io_close);
jbe@88 417 lua_pushvalue(L, idx);
jbe@88 418 lua_pushinteger(L, timeout);
jbe@88 419 lua_call(L, 2, 0);
jbe@88 420 }
jbe@88 421 }
jbe@88 422
jbe@95 423 void moonbr_io_pushhandle(lua_State *L, int fd, int isnetwork) {
jbe@79 424 moonbr_io_handle_t *handle;
jbe@79 425 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 426 handle->fd = fd;
jbe@95 427 handle->isnetwork = isnetwork;
jbe@94 428 handle->finished = 0;
jbe@94 429 handle->closed = 0;
jbe@81 430 handle->nonblocking = -1;
jbe@95 431 handle->nopush = -1;
jbe@85 432 handle->readerr = 0;
jbe@85 433 handle->readbufcnt = 0;
jbe@81 434 handle->writeerr = 0;
jbe@81 435 handle->writeleft = 0;
jbe@83 436 handle->writeqin = 0;
jbe@83 437 handle->writeqout = 0;
jbe@81 438 handle->writeqoff = 0;
jbe@81 439 handle->writebufcnt = 0;
jbe@87 440 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 441 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 442 lua_setmetatable(L, -2);
jbe@79 443 lua_newtable(L); // uservalue
jbe@81 444 lua_newtable(L);
jbe@81 445 lua_setfield(L, -2, "writebuf");
jbe@79 446 lua_newtable(L); // public
jbe@79 447 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 448 lua_setmetatable(L, -2);
jbe@79 449 lua_setfield(L, -2, "public");
jbe@79 450 lua_setuservalue(L, -2);
jbe@79 451 }
jbe@79 452
jbe@79 453 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 454 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 455 lua_getuservalue(L, 1);
jbe@79 456 lua_getfield(L, -1, "public");
jbe@79 457 lua_pushvalue(L, 2);
jbe@79 458 lua_gettable(L, -2);
jbe@79 459 return 1;
jbe@79 460 }
jbe@79 461
jbe@79 462 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 463 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 464 lua_getuservalue(L, 1);
jbe@79 465 lua_getfield(L, -1, "public");
jbe@79 466 lua_pushvalue(L, 2);
jbe@79 467 lua_pushvalue(L, 3);
jbe@79 468 lua_settable(L, -3);
jbe@79 469 return 0;
jbe@79 470 }
jbe@79 471
jbe@79 472 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 473 {"read", moonbr_io_read},
jbe@85 474 {"read_nb", moonbr_io_read_nb},
jbe@86 475 {"drain", moonbr_io_drain},
jbe@86 476 {"drain_nb", moonbr_io_drain_nb},
jbe@80 477 {"write", moonbr_io_write},
jbe@81 478 {"write_nb", moonbr_io_write_nb},
jbe@80 479 {"flush", moonbr_io_flush},
jbe@81 480 {"flush_nb", moonbr_io_flush_nb},
jbe@88 481 {"finish", moonbr_io_finish},
jbe@87 482 {"close", moonbr_io_close},
jbe@85 483 {"reset", moonbr_io_reset},
jbe@79 484 {NULL, NULL}
jbe@79 485 };
jbe@79 486
jbe@79 487 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 488 {"__index", moonbr_io_handleindex},
jbe@79 489 {"__newindex", moonbr_io_handlenewindex},
jbe@88 490 {"__gc", moonbr_io_gc},
jbe@79 491 {NULL, NULL}
jbe@79 492 };
jbe@79 493
jbe@79 494 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@79 495 {NULL, NULL}
jbe@79 496 };
jbe@79 497
jbe@79 498 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 499
jbe@80 500 lua_newtable(L); // module
jbe@80 501
jbe@79 502 lua_newtable(L); // public metatable
jbe@79 503 lua_newtable(L); // handle methods
jbe@79 504 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 505 lua_pushvalue(L, -1);
jbe@80 506 lua_setfield(L, -4, "handle");
jbe@79 507 lua_setfield(L, -2, "__index");
jbe@79 508 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 509
jbe@79 510 lua_newtable(L); // handle metatable
jbe@79 511 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@79 512 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 513
jbe@79 514 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 515 return 1;
jbe@79 516
jbe@79 517 }
jbe@79 518

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