1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved. 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to 5 * deal in the Software without restriction, including without limitation the 6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 7 * sell copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 19 * IN THE SOFTWARE. 20 */ 21 22 /* 23 * This file is private to libuv. It provides common functionality to both 24 * Windows and Unix backends. 25 */ 26 27 #ifndef UV_COMMON_H_ 28 #define UV_COMMON_H_ 29 30 #include <assert.h> 31 #include <stdarg.h> 32 #include <stddef.h> 33 #include <stdint.h> 34 35 #include "uv.h" 36 #include "uv/tree.h" 37 #include "queue.h" 38 #include "strscpy.h" 39 40 #ifndef _MSC_VER 41 # include <stdatomic.h> 42 #endif 43 44 #if EDOM > 0 45 # define UV__ERR(x) (-(x)) 46 #else 47 # define UV__ERR(x) (x) 48 #endif 49 50 #if !defined(snprintf) && defined(_MSC_VER) && _MSC_VER < 1900 51 extern int snprintf(char*, size_t, const char*, ...); 52 #endif 53 54 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 55 #define ARRAY_END(a) ((a) + ARRAY_SIZE(a)) 56 57 #define container_of(ptr, type, member) \ 58 ((type *) ((char *) (ptr) - offsetof(type, member))) 59 60 /* C11 defines static_assert to be a macro which calls _Static_assert. */ 61 #if defined(static_assert) 62 #define STATIC_ASSERT(expr) static_assert(expr, #expr) 63 #else 64 #define STATIC_ASSERT(expr) \ 65 void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)]) 66 #endif 67 68 #ifdef _MSC_VER 69 #define uv__exchange_int_relaxed(p, v) \ 70 InterlockedExchangeNoFence((LONG volatile*)(p), v) 71 #else 72 #define uv__exchange_int_relaxed(p, v) \ 73 atomic_exchange_explicit((_Atomic int*)(p), v, memory_order_relaxed) 74 #endif 75 76 #define UV__UDP_DGRAM_MAXSIZE (64 * 1024) 77 78 /* Handle flags. Some flags are specific to Windows or UNIX. */ 79 enum { 80 /* Used by all handles. */ 81 UV_HANDLE_CLOSING = 0x00000001, 82 UV_HANDLE_CLOSED = 0x00000002, 83 UV_HANDLE_ACTIVE = 0x00000004, 84 UV_HANDLE_REF = 0x00000008, 85 UV_HANDLE_INTERNAL = 0x00000010, 86 UV_HANDLE_ENDGAME_QUEUED = 0x00000020, 87 88 /* Used by streams. */ 89 UV_HANDLE_LISTENING = 0x00000040, 90 UV_HANDLE_CONNECTION = 0x00000080, 91 UV_HANDLE_SHUT = 0x00000200, 92 UV_HANDLE_READ_PARTIAL = 0x00000400, 93 UV_HANDLE_READ_EOF = 0x00000800, 94 95 /* Used by streams and UDP handles. */ 96 UV_HANDLE_READING = 0x00001000, 97 UV_HANDLE_BOUND = 0x00002000, 98 UV_HANDLE_READABLE = 0x00004000, 99 UV_HANDLE_WRITABLE = 0x00008000, 100 UV_HANDLE_READ_PENDING = 0x00010000, 101 UV_HANDLE_SYNC_BYPASS_IOCP = 0x00020000, 102 UV_HANDLE_ZERO_READ = 0x00040000, 103 UV_HANDLE_EMULATE_IOCP = 0x00080000, 104 UV_HANDLE_BLOCKING_WRITES = 0x00100000, 105 UV_HANDLE_CANCELLATION_PENDING = 0x00200000, 106 107 /* Used by uv_tcp_t and uv_udp_t handles */ 108 UV_HANDLE_IPV6 = 0x00400000, 109 110 /* Only used by uv_tcp_t handles. */ 111 UV_HANDLE_TCP_NODELAY = 0x01000000, 112 UV_HANDLE_TCP_KEEPALIVE = 0x02000000, 113 UV_HANDLE_TCP_SINGLE_ACCEPT = 0x04000000, 114 UV_HANDLE_TCP_ACCEPT_STATE_CHANGING = 0x08000000, 115 UV_HANDLE_SHARED_TCP_SOCKET = 0x10000000, 116 117 /* Only used by uv_udp_t handles. */ 118 UV_HANDLE_UDP_PROCESSING = 0x01000000, 119 UV_HANDLE_UDP_CONNECTED = 0x02000000, 120 UV_HANDLE_UDP_RECVMMSG = 0x04000000, 121 122 /* Only used by uv_pipe_t handles. */ 123 UV_HANDLE_NON_OVERLAPPED_PIPE = 0x01000000, 124 UV_HANDLE_PIPESERVER = 0x02000000, 125 126 /* Only used by uv_tty_t handles. */ 127 UV_HANDLE_TTY_READABLE = 0x01000000, 128 UV_HANDLE_TTY_RAW = 0x02000000, 129 UV_HANDLE_TTY_SAVED_POSITION = 0x04000000, 130 UV_HANDLE_TTY_SAVED_ATTRIBUTES = 0x08000000, 131 132 /* Only used by uv_signal_t handles. */ 133 UV_SIGNAL_ONE_SHOT_DISPATCHED = 0x01000000, 134 UV_SIGNAL_ONE_SHOT = 0x02000000, 135 136 /* Only used by uv_poll_t handles. */ 137 UV_HANDLE_POLL_SLOW = 0x01000000, 138 139 /* Only used by uv_process_t handles. */ 140 UV_HANDLE_REAP = 0x10000000 141 }; 142 143 int uv__loop_configure(uv_loop_t* loop, uv_loop_option option, va_list ap); 144 145 void uv__loop_close(uv_loop_t* loop); 146 147 int uv__read_start(uv_stream_t* stream, 148 uv_alloc_cb alloc_cb, 149 uv_read_cb read_cb); 150 151 int uv__tcp_bind(uv_tcp_t* tcp, 152 const struct sockaddr* addr, 153 unsigned int addrlen, 154 unsigned int flags); 155 156 int uv__tcp_connect(uv_connect_t* req, 157 uv_tcp_t* handle, 158 const struct sockaddr* addr, 159 unsigned int addrlen, 160 uv_connect_cb cb); 161 162 int uv__udp_init_ex(uv_loop_t* loop, 163 uv_udp_t* handle, 164 unsigned flags, 165 int domain); 166 167 int uv__udp_bind(uv_udp_t* handle, 168 const struct sockaddr* addr, 169 unsigned int addrlen, 170 unsigned int flags); 171 172 int uv__udp_connect(uv_udp_t* handle, 173 const struct sockaddr* addr, 174 unsigned int addrlen); 175 176 int uv__udp_disconnect(uv_udp_t* handle); 177 178 int uv__udp_is_connected(uv_udp_t* handle); 179 180 int uv__udp_send(uv_udp_send_t* req, 181 uv_udp_t* handle, 182 const uv_buf_t bufs[], 183 unsigned int nbufs, 184 const struct sockaddr* addr, 185 unsigned int addrlen, 186 uv_udp_send_cb send_cb); 187 188 int uv__udp_try_send(uv_udp_t* handle, 189 const uv_buf_t bufs[], 190 unsigned int nbufs, 191 const struct sockaddr* addr, 192 unsigned int addrlen); 193 194 int uv__udp_try_send2(uv_udp_t* handle, 195 unsigned int count, 196 uv_buf_t* bufs[/*count*/], 197 unsigned int nbufs[/*count*/], 198 struct sockaddr* addrs[/*count*/]); 199 200 int uv__udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloccb, 201 uv_udp_recv_cb recv_cb); 202 203 int uv__udp_recv_stop(uv_udp_t* handle); 204 205 void uv__fs_poll_close(uv_fs_poll_t* handle); 206 207 int uv__getaddrinfo_translate_error(int sys_err); /* EAI_* error. */ 208 209 enum uv__work_kind { 210 UV__WORK_CPU, 211 UV__WORK_FAST_IO, 212 UV__WORK_SLOW_IO 213 }; 214 215 void uv__work_submit(uv_loop_t* loop, 216 struct uv__work *w, 217 enum uv__work_kind kind, 218 void (*work)(struct uv__work *w), 219 void (*done)(struct uv__work *w, int status)); 220 221 void uv__work_done(uv_async_t* handle); 222 223 size_t uv__count_bufs(const uv_buf_t bufs[], unsigned int nbufs); 224 225 int uv__socket_sockopt(uv_handle_t* handle, int optname, int* value); 226 227 void uv__fs_scandir_cleanup(uv_fs_t* req); 228 void uv__fs_readdir_cleanup(uv_fs_t* req); 229 uv_dirent_type_t uv__fs_get_dirent_type(uv__dirent_t* dent); 230 231 int uv__next_timeout(const uv_loop_t* loop); 232 void uv__run_timers(uv_loop_t* loop); 233 void uv__timer_close(uv_timer_t* handle); 234 235 void uv__process_title_cleanup(void); 236 void uv__signal_cleanup(void); 237 void uv__threadpool_cleanup(void); 238 239 #define uv__has_active_reqs(loop) \ 240 ((loop)->active_reqs.count > 0) 241 242 #define uv__req_register(loop) \ 243 do { \ 244 (loop)->active_reqs.count++; \ 245 } \ 246 while (0) 247 248 #define uv__req_unregister(loop) \ 249 do { \ 250 assert(uv__has_active_reqs(loop)); \ 251 (loop)->active_reqs.count--; \ 252 } \ 253 while (0) 254 255 #define uv__has_active_handles(loop) \ 256 ((loop)->active_handles > 0) 257 258 #define uv__active_handle_add(h) \ 259 do { \ 260 (h)->loop->active_handles++; \ 261 } \ 262 while (0) 263 264 #define uv__active_handle_rm(h) \ 265 do { \ 266 (h)->loop->active_handles--; \ 267 } \ 268 while (0) 269 270 #define uv__is_active(h) \ 271 (((h)->flags & UV_HANDLE_ACTIVE) != 0) 272 273 #define uv__is_closing(h) \ 274 (((h)->flags & (UV_HANDLE_CLOSING | UV_HANDLE_CLOSED)) != 0) 275 276 #if defined(_WIN32) 277 # define uv__is_stream_shutting(h) \ 278 (h->stream.conn.shutdown_req != NULL) 279 #else 280 # define uv__is_stream_shutting(h) \ 281 (h->shutdown_req != NULL) 282 #endif 283 284 #define uv__handle_start(h) \ 285 do { \ 286 if (((h)->flags & UV_HANDLE_ACTIVE) != 0) break; \ 287 (h)->flags |= UV_HANDLE_ACTIVE; \ 288 if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_add(h); \ 289 } \ 290 while (0) 291 292 #define uv__handle_stop(h) \ 293 do { \ 294 if (((h)->flags & UV_HANDLE_ACTIVE) == 0) break; \ 295 (h)->flags &= ~UV_HANDLE_ACTIVE; \ 296 if (((h)->flags & UV_HANDLE_REF) != 0) uv__active_handle_rm(h); \ 297 } \ 298 while (0) 299 300 #define uv__handle_ref(h) \ 301 do { \ 302 if (((h)->flags & UV_HANDLE_REF) != 0) break; \ 303 (h)->flags |= UV_HANDLE_REF; \ 304 if (((h)->flags & UV_HANDLE_CLOSING) != 0) break; \ 305 if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_add(h); \ 306 } \ 307 while (0) 308 309 #define uv__handle_unref(h) \ 310 do { \ 311 if (((h)->flags & UV_HANDLE_REF) == 0) break; \ 312 (h)->flags &= ~UV_HANDLE_REF; \ 313 if (((h)->flags & UV_HANDLE_CLOSING) != 0) break; \ 314 if (((h)->flags & UV_HANDLE_ACTIVE) != 0) uv__active_handle_rm(h); \ 315 } \ 316 while (0) 317 318 #define uv__has_ref(h) \ 319 (((h)->flags & UV_HANDLE_REF) != 0) 320 321 #if defined(_WIN32) 322 # define uv__handle_platform_init(h) ((h)->u.fd = -1) 323 #else 324 # define uv__handle_platform_init(h) ((h)->next_closing = NULL) 325 #endif 326 327 #define uv__handle_init(loop_, h, type_) \ 328 do { \ 329 (h)->loop = (loop_); \ 330 (h)->type = (type_); \ 331 (h)->flags = UV_HANDLE_REF; /* Ref the loop when active. */ \ 332 uv__queue_insert_tail(&(loop_)->handle_queue, &(h)->handle_queue); \ 333 uv__handle_platform_init(h); \ 334 } \ 335 while (0) 336 337 /* Note: uses an open-coded version of SET_REQ_SUCCESS() because of 338 * a circular dependency between src/uv-common.h and src/win/internal.h. 339 */ 340 #if defined(_WIN32) 341 # define UV_REQ_INIT(req, typ) \ 342 do { \ 343 (req)->type = (typ); \ 344 (req)->u.io.overlapped.Internal = 0; /* SET_REQ_SUCCESS() */ \ 345 } \ 346 while (0) 347 #else 348 # define UV_REQ_INIT(req, typ) \ 349 do { \ 350 (req)->type = (typ); \ 351 } \ 352 while (0) 353 #endif 354 355 #define uv__req_init(loop, req, typ) \ 356 do { \ 357 UV_REQ_INIT(req, typ); \ 358 uv__req_register(loop); \ 359 } \ 360 while (0) 361 362 #define uv__get_internal_fields(loop) \ 363 ((uv__loop_internal_fields_t*) loop->internal_fields) 364 365 #define uv__get_loop_metrics(loop) \ 366 (&uv__get_internal_fields(loop)->loop_metrics) 367 368 #define uv__metrics_inc_loop_count(loop) \ 369 do { \ 370 uv__get_loop_metrics(loop)->metrics.loop_count++; \ 371 } while (0) 372 373 #define uv__metrics_inc_events(loop, e) \ 374 do { \ 375 uv__get_loop_metrics(loop)->metrics.events += (e); \ 376 } while (0) 377 378 #define uv__metrics_inc_events_waiting(loop, e) \ 379 do { \ 380 uv__get_loop_metrics(loop)->metrics.events_waiting += (e); \ 381 } while (0) 382 383 /* Allocator prototypes */ 384 void *uv__calloc(size_t count, size_t size); 385 char *uv__strdup(const char* s); 386 char *uv__strndup(const char* s, size_t n); 387 void* uv__malloc(size_t size); 388 void uv__free(void* ptr); 389 void* uv__realloc(void* ptr, size_t size); 390 void* uv__reallocf(void* ptr, size_t size); 391 392 typedef struct uv__loop_metrics_s uv__loop_metrics_t; 393 typedef struct uv__loop_internal_fields_s uv__loop_internal_fields_t; 394 395 struct uv__loop_metrics_s { 396 uv_metrics_t metrics; 397 uint64_t provider_entry_time; 398 uint64_t provider_idle_time; 399 uv_mutex_t lock; 400 }; 401 402 void uv__metrics_update_idle_time(uv_loop_t* loop); 403 void uv__metrics_set_provider_entry_time(uv_loop_t* loop); 404 405 #ifdef __linux__ 406 struct uv__iou { 407 uint32_t* sqhead; 408 uint32_t* sqtail; 409 uint32_t sqmask; 410 uint32_t* sqflags; 411 uint32_t* cqhead; 412 uint32_t* cqtail; 413 uint32_t cqmask; 414 void* sq; /* pointer to munmap() on event loop teardown */ 415 void* cqe; /* pointer to array of struct uv__io_uring_cqe */ 416 void* sqe; /* pointer to array of struct uv__io_uring_sqe */ 417 size_t sqlen; 418 size_t cqlen; 419 size_t maxlen; 420 size_t sqelen; 421 int ringfd; 422 uint32_t in_flight; 423 }; 424 #endif /* __linux__ */ 425 426 struct uv__loop_internal_fields_s { 427 unsigned int flags; 428 uv__loop_metrics_t loop_metrics; 429 int current_timeout; 430 #ifdef __linux__ 431 struct uv__iou ctl; 432 struct uv__iou iou; 433 void* inv; /* used by uv__platform_invalidate_fd() */ 434 #endif /* __linux__ */ 435 }; 436 437 #if defined(_WIN32) 438 # define UV_PTHREAD_MAX_NAMELEN_NP 32767 439 #elif defined(__APPLE__) 440 # define UV_PTHREAD_MAX_NAMELEN_NP 64 441 #elif defined(__NetBSD__) || defined(__illumos__) 442 # define UV_PTHREAD_MAX_NAMELEN_NP PTHREAD_MAX_NAMELEN_NP 443 #elif defined (__linux__) 444 # define UV_PTHREAD_MAX_NAMELEN_NP 16 445 #elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 446 # define UV_PTHREAD_MAX_NAMELEN_NP (MAXCOMLEN + 1) 447 #else 448 # define UV_PTHREAD_MAX_NAMELEN_NP 16 449 #endif 450 451 #endif /* UV_COMMON_H_ */ 452
