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1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
4 //
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
10
11 /*!
12  * Low-level bindings to the libuv library.
13  *
14  * This module contains a set of direct, 'bare-metal' wrappers around
15  * the libuv C-API.
16  *
17  * We're not bothering yet to redefine uv's structs as Rust structs
18  * because they are quite large and change often between versions.
19  * The maintenance burden is just too high. Instead we use the uv's
20  * `uv_handle_size` and `uv_req_size` to find the correct size of the
21  * structs and allocate them on the heap. This can be revisited later.
22  *
23  * There are also a collection of helper functions to ease interacting
24  * with the low-level API.
25  *
26  * As new functionality, existent in uv.h, is added to the rust stdlib,
27  * the mappings should be added in this module.
28  */
29
30 #![allow(non_camel_case_types)] // C types
31
32 use std::libc::{size_t, c_int, c_uint, c_void, c_char, c_double};
33 use std::libc::{ssize_t, sockaddr, free, addrinfo};
34 use std::libc;
35 use std::rt::global_heap::malloc_raw;
36
37 #[cfg(test)]
38 use std::libc::uintptr_t;
39
40 pub use self::errors::{EACCES, ECONNREFUSED, ECONNRESET, EPIPE, ECONNABORTED,
41                        ECANCELED, EBADF, ENOTCONN, ENOENT, EADDRNOTAVAIL};
42
43 pub static OK: c_int = 0;
44 pub static EOF: c_int = -4095;
45 pub static UNKNOWN: c_int = -4094;
46
47 // uv-errno.h redefines error codes for windows, but not for unix...
48 // https://github.com/joyent/libuv/blob/master/include/uv-errno.h
49
50 #[cfg(windows)]
51 pub mod errors {
52     use std::libc::c_int;
53
54     pub static EACCES: c_int = -4092;
55     pub static ECONNREFUSED: c_int = -4078;
56     pub static ECONNRESET: c_int = -4077;
57     pub static ENOENT: c_int = -4058;
58     pub static ENOTCONN: c_int = -4053;
59     pub static EPIPE: c_int = -4047;
60     pub static ECONNABORTED: c_int = -4079;
61     pub static ECANCELED: c_int = -4081;
62     pub static EBADF: c_int = -4083;
63     pub static EADDRNOTAVAIL: c_int = -4090;
64 }
65 #[cfg(not(windows))]
66 pub mod errors {
67     use std::libc;
68     use std::libc::c_int;
69
70     pub static EACCES: c_int = -libc::EACCES;
71     pub static ECONNREFUSED: c_int = -libc::ECONNREFUSED;
72     pub static ECONNRESET: c_int = -libc::ECONNRESET;
73     pub static ENOENT: c_int = -libc::ENOENT;
74     pub static ENOTCONN: c_int = -libc::ENOTCONN;
75     pub static EPIPE: c_int = -libc::EPIPE;
76     pub static ECONNABORTED: c_int = -libc::ECONNABORTED;
77     pub static ECANCELED : c_int = -libc::ECANCELED;
78     pub static EBADF : c_int = -libc::EBADF;
79     pub static EADDRNOTAVAIL : c_int = -libc::EADDRNOTAVAIL;
80 }
81
82 pub static PROCESS_SETUID: c_int = 1 << 0;
83 pub static PROCESS_SETGID: c_int = 1 << 1;
84 pub static PROCESS_WINDOWS_VERBATIM_ARGUMENTS: c_int = 1 << 2;
85 pub static PROCESS_DETACHED: c_int = 1 << 3;
86 pub static PROCESS_WINDOWS_HIDE: c_int = 1 << 4;
87
88 pub static STDIO_IGNORE: c_int = 0x00;
89 pub static STDIO_CREATE_PIPE: c_int = 0x01;
90 pub static STDIO_INHERIT_FD: c_int = 0x02;
91 pub static STDIO_INHERIT_STREAM: c_int = 0x04;
92 pub static STDIO_READABLE_PIPE: c_int = 0x10;
93 pub static STDIO_WRITABLE_PIPE: c_int = 0x20;
94
95 #[cfg(unix)]
96 pub type uv_buf_len_t = libc::size_t;
97 #[cfg(windows)]
98 pub type uv_buf_len_t = libc::c_ulong;
99
100 // see libuv/include/uv-unix.h
101 #[cfg(unix)]
102 pub struct uv_buf_t {
103     base: *u8,
104     len: uv_buf_len_t,
105 }
106
107 // see libuv/include/uv-win.h
108 #[cfg(windows)]
109 pub struct uv_buf_t {
110     len: uv_buf_len_t,
111     base: *u8,
112 }
113
114 #[repr(C)]
115 pub enum uv_run_mode {
116     RUN_DEFAULT = 0,
117     RUN_ONCE,
118     RUN_NOWAIT,
119 }
120
121 pub struct uv_process_options_t {
122     exit_cb: uv_exit_cb,
123     file: *libc::c_char,
124     args: **libc::c_char,
125     env: **libc::c_char,
126     cwd: *libc::c_char,
127     flags: libc::c_uint,
128     stdio_count: libc::c_int,
129     stdio: *uv_stdio_container_t,
130     uid: uv_uid_t,
131     gid: uv_gid_t,
132 }
133
134 // These fields are private because they must be interfaced with through the
135 // functions below.
136 pub struct uv_stdio_container_t {
137     priv flags: libc::c_int,
138     priv stream: *uv_stream_t,
139 }
140
141 pub type uv_handle_t = c_void;
142 pub type uv_req_t = c_void;
143 pub type uv_loop_t = c_void;
144 pub type uv_idle_t = c_void;
145 pub type uv_tcp_t = c_void;
146 pub type uv_udp_t = c_void;
147 pub type uv_connect_t = c_void;
148 pub type uv_connection_t = c_void;
149 pub type uv_write_t = c_void;
150 pub type uv_async_t = c_void;
151 pub type uv_timer_t = c_void;
152 pub type uv_stream_t = c_void;
153 pub type uv_fs_t = c_void;
154 pub type uv_udp_send_t = c_void;
155 pub type uv_getaddrinfo_t = c_void;
156 pub type uv_process_t = c_void;
157 pub type uv_pipe_t = c_void;
158 pub type uv_tty_t = c_void;
159 pub type uv_signal_t = c_void;
160 pub type uv_shutdown_t = c_void;
161
162 pub struct uv_timespec_t {
163     tv_sec: libc::c_long,
164     tv_nsec: libc::c_long
165 }
166
167 pub struct uv_stat_t {
168     st_dev: libc::uint64_t,
169     st_mode: libc::uint64_t,
170     st_nlink: libc::uint64_t,
171     st_uid: libc::uint64_t,
172     st_gid: libc::uint64_t,
173     st_rdev: libc::uint64_t,
174     st_ino: libc::uint64_t,
175     st_size: libc::uint64_t,
176     st_blksize: libc::uint64_t,
177     st_blocks: libc::uint64_t,
178     st_flags: libc::uint64_t,
179     st_gen: libc::uint64_t,
180     st_atim: uv_timespec_t,
181     st_mtim: uv_timespec_t,
182     st_ctim: uv_timespec_t,
183     st_birthtim: uv_timespec_t
184 }
185
186 impl uv_stat_t {
187     pub fn new() -> uv_stat_t {
188         uv_stat_t {
189             st_dev: 0,
190             st_mode: 0,
191             st_nlink: 0,
192             st_uid: 0,
193             st_gid: 0,
194             st_rdev: 0,
195             st_ino: 0,
196             st_size: 0,
197             st_blksize: 0,
198             st_blocks: 0,
199             st_flags: 0,
200             st_gen: 0,
201             st_atim: uv_timespec_t { tv_sec: 0, tv_nsec: 0 },
202             st_mtim: uv_timespec_t { tv_sec: 0, tv_nsec: 0 },
203             st_ctim: uv_timespec_t { tv_sec: 0, tv_nsec: 0 },
204             st_birthtim: uv_timespec_t { tv_sec: 0, tv_nsec: 0 }
205         }
206     }
207     pub fn is_file(&self) -> bool {
208         ((self.st_mode) & libc::S_IFMT as libc::uint64_t) == libc::S_IFREG as libc::uint64_t
209     }
210     pub fn is_dir(&self) -> bool {
211         ((self.st_mode) & libc::S_IFMT as libc::uint64_t) == libc::S_IFDIR as libc::uint64_t
212     }
213 }
214
215 pub type uv_idle_cb = extern "C" fn(handle: *uv_idle_t,
216                                     status: c_int);
217 pub type uv_alloc_cb = extern "C" fn(stream: *uv_stream_t,
218                                      suggested_size: size_t,
219                                      buf: *mut uv_buf_t);
220 pub type uv_read_cb = extern "C" fn(stream: *uv_stream_t,
221                                     nread: ssize_t,
222                                     buf: *uv_buf_t);
223 pub type uv_udp_send_cb = extern "C" fn(req: *uv_udp_send_t,
224                                         status: c_int);
225 pub type uv_udp_recv_cb = extern "C" fn(handle: *uv_udp_t,
226                                         nread: ssize_t,
227                                         buf: *uv_buf_t,
228                                         addr: *sockaddr,
229                                         flags: c_uint);
230 pub type uv_close_cb = extern "C" fn(handle: *uv_handle_t);
231 pub type uv_walk_cb = extern "C" fn(handle: *uv_handle_t,
232                                     arg: *c_void);
233 pub type uv_async_cb = extern "C" fn(handle: *uv_async_t,
234                                      status: c_int);
235 pub type uv_connect_cb = extern "C" fn(handle: *uv_connect_t,
236                                        status: c_int);
237 pub type uv_connection_cb = extern "C" fn(handle: *uv_connection_t,
238                                           status: c_int);
239 pub type uv_timer_cb = extern "C" fn(handle: *uv_timer_t,
240                                      status: c_int);
241 pub type uv_write_cb = extern "C" fn(handle: *uv_write_t,
242                                      status: c_int);
243 pub type uv_getaddrinfo_cb = extern "C" fn(req: *uv_getaddrinfo_t,
244                                            status: c_int,
245                                            res: *addrinfo);
246 pub type uv_exit_cb = extern "C" fn(handle: *uv_process_t,
247                                     exit_status: i64,
248                                     term_signal: c_int);
249 pub type uv_signal_cb = extern "C" fn(handle: *uv_signal_t,
250                                       signum: c_int);
251 pub type uv_fs_cb = extern "C" fn(req: *uv_fs_t);
252 pub type uv_shutdown_cb = extern "C" fn(req: *uv_shutdown_t, status: c_int);
253
254 #[cfg(unix)] pub type uv_uid_t = libc::types::os::arch::posix88::uid_t;
255 #[cfg(unix)] pub type uv_gid_t = libc::types::os::arch::posix88::gid_t;
256 #[cfg(windows)] pub type uv_uid_t = libc::c_uchar;
257 #[cfg(windows)] pub type uv_gid_t = libc::c_uchar;
258
259 #[repr(C)]
260 #[deriving(Eq)]
261 pub enum uv_handle_type {
262     UV_UNKNOWN_HANDLE,
263     UV_ASYNC,
264     UV_CHECK,
265     UV_FS_EVENT,
266     UV_FS_POLL,
267     UV_HANDLE,
268     UV_IDLE,
269     UV_NAMED_PIPE,
270     UV_POLL,
271     UV_PREPARE,
272     UV_PROCESS,
273     UV_STREAM,
274     UV_TCP,
275     UV_TIMER,
276     UV_TTY,
277     UV_UDP,
278     UV_SIGNAL,
279     UV_FILE,
280     UV_HANDLE_TYPE_MAX
281 }
282
283 #[repr(C)]
284 #[cfg(unix)]
285 #[deriving(Eq)]
286 pub enum uv_req_type {
287     UV_UNKNOWN_REQ,
288     UV_REQ,
289     UV_CONNECT,
290     UV_WRITE,
291     UV_SHUTDOWN,
292     UV_UDP_SEND,
293     UV_FS,
294     UV_WORK,
295     UV_GETADDRINFO,
296     UV_REQ_TYPE_MAX
297 }
298
299 // uv_req_type may have additional fields defined by UV_REQ_TYPE_PRIVATE.
300 // See UV_REQ_TYPE_PRIVATE at libuv/include/uv-win.h
301 #[repr(C)]
302 #[cfg(windows)]
303 #[deriving(Eq)]
304 pub enum uv_req_type {
305     UV_UNKNOWN_REQ,
306     UV_REQ,
307     UV_CONNECT,
308     UV_WRITE,
309     UV_SHUTDOWN,
310     UV_UDP_SEND,
311     UV_FS,
312     UV_WORK,
313     UV_GETADDRINFO,
314     UV_ACCEPT,
315     UV_FS_EVENT_REQ,
316     UV_POLL_REQ,
317     UV_PROCESS_EXIT,
318     UV_READ,
319     UV_UDP_RECV,
320     UV_WAKEUP,
321     UV_SIGNAL_REQ,
322     UV_REQ_TYPE_MAX
323 }
324
325 #[repr(C)]
326 #[deriving(Eq)]
327 pub enum uv_membership {
328     UV_LEAVE_GROUP,
329     UV_JOIN_GROUP
330 }
331
332 pub unsafe fn malloc_handle(handle: uv_handle_type) -> *c_void {
333     assert!(handle != UV_UNKNOWN_HANDLE && handle != UV_HANDLE_TYPE_MAX);
334     let size = uv_handle_size(handle);
335     malloc_raw(size as uint) as *c_void
336 }
337
338 pub unsafe fn free_handle(v: *c_void) {
339     free(v as *mut c_void)
340 }
341
342 pub unsafe fn malloc_req(req: uv_req_type) -> *c_void {
343     assert!(req != UV_UNKNOWN_REQ && req != UV_REQ_TYPE_MAX);
344     let size = uv_req_size(req);
345     malloc_raw(size as uint) as *c_void
346 }
347
348 pub unsafe fn free_req(v: *c_void) {
349     free(v as *mut c_void)
350 }
351
352 #[test]
353 fn handle_sanity_check() {
354     unsafe {
355         assert_eq!(UV_HANDLE_TYPE_MAX as uint, rust_uv_handle_type_max());
356     }
357 }
358
359 #[test]
360 fn request_sanity_check() {
361     unsafe {
362         assert_eq!(UV_REQ_TYPE_MAX as uint, rust_uv_req_type_max());
363     }
364 }
365
366 // FIXME Event loops ignore SIGPIPE by default.
367 pub unsafe fn loop_new() -> *c_void {
368     return rust_uv_loop_new();
369 }
370
371 pub unsafe fn uv_write(req: *uv_write_t,
372                        stream: *uv_stream_t,
373                        buf_in: &[uv_buf_t],
374                        cb: uv_write_cb) -> c_int {
375     extern {
376         fn uv_write(req: *uv_write_t, stream: *uv_stream_t,
377                     buf_in: *uv_buf_t, buf_cnt: c_int,
378                     cb: uv_write_cb) -> c_int;
379     }
380
381     let buf_ptr = buf_in.as_ptr();
382     let buf_cnt = buf_in.len() as i32;
383     return uv_write(req, stream, buf_ptr, buf_cnt, cb);
384 }
385
386 pub unsafe fn uv_udp_send(req: *uv_udp_send_t,
387                           handle: *uv_udp_t,
388                           buf_in: &[uv_buf_t],
389                           addr: *sockaddr,
390                           cb: uv_udp_send_cb) -> c_int {
391     extern {
392         fn uv_udp_send(req: *uv_write_t, stream: *uv_stream_t,
393                        buf_in: *uv_buf_t, buf_cnt: c_int, addr: *sockaddr,
394                        cb: uv_udp_send_cb) -> c_int;
395     }
396
397     let buf_ptr = buf_in.as_ptr();
398     let buf_cnt = buf_in.len() as i32;
399     return uv_udp_send(req, handle, buf_ptr, buf_cnt, addr, cb);
400 }
401
402 pub unsafe fn get_udp_handle_from_send_req(send_req: *uv_udp_send_t) -> *uv_udp_t {
403     return rust_uv_get_udp_handle_from_send_req(send_req);
404 }
405
406 pub unsafe fn process_pid(p: *uv_process_t) -> c_int {
407
408     return rust_uv_process_pid(p);
409 }
410
411 pub unsafe fn set_stdio_container_flags(c: *uv_stdio_container_t,
412                                         flags: libc::c_int) {
413
414     rust_set_stdio_container_flags(c, flags);
415 }
416
417 pub unsafe fn set_stdio_container_fd(c: *uv_stdio_container_t,
418                                      fd: libc::c_int) {
419
420     rust_set_stdio_container_fd(c, fd);
421 }
422
423 pub unsafe fn set_stdio_container_stream(c: *uv_stdio_container_t,
424                                          stream: *uv_stream_t) {
425     rust_set_stdio_container_stream(c, stream);
426 }
427
428 // data access helpers
429 pub unsafe fn get_result_from_fs_req(req: *uv_fs_t) -> ssize_t {
430     rust_uv_get_result_from_fs_req(req)
431 }
432 pub unsafe fn get_ptr_from_fs_req(req: *uv_fs_t) -> *libc::c_void {
433     rust_uv_get_ptr_from_fs_req(req)
434 }
435 pub unsafe fn get_path_from_fs_req(req: *uv_fs_t) -> *c_char {
436     rust_uv_get_path_from_fs_req(req)
437 }
438 pub unsafe fn get_loop_from_fs_req(req: *uv_fs_t) -> *uv_loop_t {
439     rust_uv_get_loop_from_fs_req(req)
440 }
441 pub unsafe fn get_loop_from_getaddrinfo_req(req: *uv_getaddrinfo_t) -> *uv_loop_t {
442     rust_uv_get_loop_from_getaddrinfo_req(req)
443 }
444 pub unsafe fn get_loop_for_uv_handle<T>(handle: *T) -> *c_void {
445     return rust_uv_get_loop_for_uv_handle(handle as *c_void);
446 }
447 pub unsafe fn get_stream_handle_from_connect_req(connect: *uv_connect_t) -> *uv_stream_t {
448     return rust_uv_get_stream_handle_from_connect_req(connect);
449 }
450 pub unsafe fn get_stream_handle_from_write_req(write_req: *uv_write_t) -> *uv_stream_t {
451     return rust_uv_get_stream_handle_from_write_req(write_req);
452 }
453 pub unsafe fn get_data_for_uv_loop(loop_ptr: *c_void) -> *c_void {
454     rust_uv_get_data_for_uv_loop(loop_ptr)
455 }
456 pub unsafe fn set_data_for_uv_loop(loop_ptr: *c_void, data: *c_void) {
457     rust_uv_set_data_for_uv_loop(loop_ptr, data);
458 }
459 pub unsafe fn get_data_for_uv_handle<T>(handle: *T) -> *c_void {
460     return rust_uv_get_data_for_uv_handle(handle as *c_void);
461 }
462 pub unsafe fn set_data_for_uv_handle<T, U>(handle: *T, data: *U) {
463     rust_uv_set_data_for_uv_handle(handle as *c_void, data as *c_void);
464 }
465 pub unsafe fn get_data_for_req<T>(req: *T) -> *c_void {
466     return rust_uv_get_data_for_req(req as *c_void);
467 }
468 pub unsafe fn set_data_for_req<T, U>(req: *T, data: *U) {
469     rust_uv_set_data_for_req(req as *c_void, data as *c_void);
470 }
471 pub unsafe fn populate_stat(req_in: *uv_fs_t, stat_out: *uv_stat_t) {
472     rust_uv_populate_uv_stat(req_in, stat_out)
473 }
474 pub unsafe fn guess_handle(handle: c_int) -> c_int {
475     rust_uv_guess_handle(handle)
476 }
477
478
479 // uv_support is the result of compiling rust_uv.cpp
480 //
481 // Note that this is in a cfg'd block so it doesn't get linked during testing.
482 // There's a bit of a conundrum when testing in that we're actually assuming
483 // that the tests are running in a uv loop, but they were created from the
484 // statically linked uv to the original rustuv crate. When we create the test
485 // executable, on some platforms if we re-link against uv, it actually creates
486 // second copies of everything. We obviously don't want this, so instead of
487 // dying horribly during testing, we allow all of the test rustuv's references
488 // to get resolved to the original rustuv crate.
489 #[cfg(not(test))]
490 #[link(name = "uv_support", kind = "static")]
491 #[link(name = "uv", kind = "static")]
492 extern {}
493
494 extern {
495     fn rust_uv_loop_new() -> *c_void;
496
497     #[cfg(test)]
498     fn rust_uv_handle_type_max() -> uintptr_t;
499     #[cfg(test)]
500     fn rust_uv_req_type_max() -> uintptr_t;
501     fn rust_uv_get_udp_handle_from_send_req(req: *uv_udp_send_t) -> *uv_udp_t;
502
503     fn rust_uv_populate_uv_stat(req_in: *uv_fs_t, stat_out: *uv_stat_t);
504     fn rust_uv_get_result_from_fs_req(req: *uv_fs_t) -> ssize_t;
505     fn rust_uv_get_ptr_from_fs_req(req: *uv_fs_t) -> *libc::c_void;
506     fn rust_uv_get_path_from_fs_req(req: *uv_fs_t) -> *c_char;
507     fn rust_uv_get_loop_from_fs_req(req: *uv_fs_t) -> *uv_loop_t;
508     fn rust_uv_get_loop_from_getaddrinfo_req(req: *uv_fs_t) -> *uv_loop_t;
509     fn rust_uv_get_stream_handle_from_connect_req(req: *uv_connect_t) -> *uv_stream_t;
510     fn rust_uv_get_stream_handle_from_write_req(req: *uv_write_t) -> *uv_stream_t;
511     fn rust_uv_get_loop_for_uv_handle(handle: *c_void) -> *c_void;
512     fn rust_uv_get_data_for_uv_loop(loop_ptr: *c_void) -> *c_void;
513     fn rust_uv_set_data_for_uv_loop(loop_ptr: *c_void, data: *c_void);
514     fn rust_uv_get_data_for_uv_handle(handle: *c_void) -> *c_void;
515     fn rust_uv_set_data_for_uv_handle(handle: *c_void, data: *c_void);
516     fn rust_uv_get_data_for_req(req: *c_void) -> *c_void;
517     fn rust_uv_set_data_for_req(req: *c_void, data: *c_void);
518     fn rust_set_stdio_container_flags(c: *uv_stdio_container_t, flags: c_int);
519     fn rust_set_stdio_container_fd(c: *uv_stdio_container_t, fd: c_int);
520     fn rust_set_stdio_container_stream(c: *uv_stdio_container_t,
521                                        stream: *uv_stream_t);
522     fn rust_uv_process_pid(p: *uv_process_t) -> c_int;
523     fn rust_uv_guess_handle(fd: c_int) -> c_int;
524
525     // generic uv functions
526     pub fn uv_loop_delete(l: *uv_loop_t);
527     pub fn uv_ref(t: *uv_handle_t);
528     pub fn uv_unref(t: *uv_handle_t);
529     pub fn uv_handle_size(ty: uv_handle_type) -> size_t;
530     pub fn uv_req_size(ty: uv_req_type) -> size_t;
531     pub fn uv_run(l: *uv_loop_t, mode: uv_run_mode) -> c_int;
532     pub fn uv_close(h: *uv_handle_t, cb: uv_close_cb);
533     pub fn uv_walk(l: *uv_loop_t, cb: uv_walk_cb, arg: *c_void);
534     pub fn uv_buf_init(base: *c_char, len: c_uint) -> uv_buf_t;
535     pub fn uv_strerror(err: c_int) -> *c_char;
536     pub fn uv_err_name(err: c_int) -> *c_char;
537     pub fn uv_listen(s: *uv_stream_t, backlog: c_int,
538                      cb: uv_connection_cb) -> c_int;
539     pub fn uv_accept(server: *uv_stream_t, client: *uv_stream_t) -> c_int;
540     pub fn uv_read_start(stream: *uv_stream_t,
541                          on_alloc: uv_alloc_cb,
542                          on_read: uv_read_cb) -> c_int;
543     pub fn uv_read_stop(stream: *uv_stream_t) -> c_int;
544     pub fn uv_shutdown(req: *uv_shutdown_t, handle: *uv_stream_t,
545                        cb: uv_shutdown_cb) -> c_int;
546
547     // idle bindings
548     pub fn uv_idle_init(l: *uv_loop_t, i: *uv_idle_t) -> c_int;
549     pub fn uv_idle_start(i: *uv_idle_t, cb: uv_idle_cb) -> c_int;
550     pub fn uv_idle_stop(i: *uv_idle_t) -> c_int;
551
552     // async bindings
553     pub fn uv_async_init(l: *uv_loop_t, a: *uv_async_t,
554                          cb: uv_async_cb) -> c_int;
555     pub fn uv_async_send(a: *uv_async_t);
556
557     // tcp bindings
558     pub fn uv_tcp_init(l: *uv_loop_t, h: *uv_tcp_t) -> c_int;
559     pub fn uv_tcp_connect(c: *uv_connect_t, h: *uv_tcp_t,
560                           addr: *sockaddr, cb: uv_connect_cb) -> c_int;
561     pub fn uv_tcp_bind(t: *uv_tcp_t, addr: *sockaddr) -> c_int;
562     pub fn uv_tcp_nodelay(h: *uv_tcp_t, enable: c_int) -> c_int;
563     pub fn uv_tcp_keepalive(h: *uv_tcp_t, enable: c_int,
564                             delay: c_uint) -> c_int;
565     pub fn uv_tcp_simultaneous_accepts(h: *uv_tcp_t, enable: c_int) -> c_int;
566     pub fn uv_tcp_getsockname(h: *uv_tcp_t, name: *mut sockaddr,
567                               len: *mut c_int) -> c_int;
568     pub fn uv_tcp_getpeername(h: *uv_tcp_t, name: *mut sockaddr,
569                               len: *mut c_int) -> c_int;
570
571     // udp bindings
572     pub fn uv_udp_init(l: *uv_loop_t, h: *uv_udp_t) -> c_int;
573     pub fn uv_udp_bind(h: *uv_udp_t, addr: *sockaddr, flags: c_uint) -> c_int;
574     pub fn uv_udp_recv_start(server: *uv_udp_t,
575                              on_alloc: uv_alloc_cb,
576                              on_recv: uv_udp_recv_cb) -> c_int;
577     pub fn uv_udp_set_membership(handle: *uv_udp_t, multicast_addr: *c_char,
578                                  interface_addr: *c_char,
579                                  membership: uv_membership) -> c_int;
580     pub fn uv_udp_recv_stop(server: *uv_udp_t) -> c_int;
581     pub fn uv_udp_set_multicast_loop(handle: *uv_udp_t, on: c_int) -> c_int;
582     pub fn uv_udp_set_multicast_ttl(handle: *uv_udp_t, ttl: c_int) -> c_int;
583     pub fn uv_udp_set_ttl(handle: *uv_udp_t, ttl: c_int) -> c_int;
584     pub fn uv_udp_set_broadcast(handle: *uv_udp_t, on: c_int) -> c_int;
585     pub fn uv_udp_getsockname(h: *uv_udp_t, name: *mut sockaddr,
586                               len: *mut c_int) -> c_int;
587
588     // timer bindings
589     pub fn uv_timer_init(l: *uv_loop_t, t: *uv_timer_t) -> c_int;
590     pub fn uv_timer_start(t: *uv_timer_t, cb: uv_timer_cb,
591                           timeout: libc::uint64_t,
592                           repeat: libc::uint64_t) -> c_int;
593     pub fn uv_timer_stop(handle: *uv_timer_t) -> c_int;
594
595     // fs operations
596     pub fn uv_fs_open(loop_ptr: *uv_loop_t, req: *uv_fs_t, path: *c_char,
597                       flags: c_int, mode: c_int, cb: uv_fs_cb) -> c_int;
598     pub fn uv_fs_unlink(loop_ptr: *uv_loop_t, req: *uv_fs_t, path: *c_char,
599                         cb: uv_fs_cb) -> c_int;
600     pub fn uv_fs_write(l: *uv_loop_t, req: *uv_fs_t, fd: c_int, buf: *c_void,
601                        len: size_t, offset: i64, cb: uv_fs_cb) -> c_int;
602     pub fn uv_fs_read(l: *uv_loop_t, req: *uv_fs_t, fd: c_int, buf: *c_void,
603                       len: size_t, offset: i64, cb: uv_fs_cb) -> c_int;
604     pub fn uv_fs_close(l: *uv_loop_t, req: *uv_fs_t, fd: c_int,
605                        cb: uv_fs_cb) -> c_int;
606     pub fn uv_fs_stat(l: *uv_loop_t, req: *uv_fs_t, path: *c_char,
607                       cb: uv_fs_cb) -> c_int;
608     pub fn uv_fs_fstat(l: *uv_loop_t, req: *uv_fs_t, fd: c_int,
609                        cb: uv_fs_cb) -> c_int;
610     pub fn uv_fs_mkdir(l: *uv_loop_t, req: *uv_fs_t, path: *c_char,
611                        mode: c_int, cb: uv_fs_cb) -> c_int;
612     pub fn uv_fs_rmdir(l: *uv_loop_t, req: *uv_fs_t, path: *c_char,
613                        cb: uv_fs_cb) -> c_int;
614     pub fn uv_fs_readdir(l: *uv_loop_t, req: *uv_fs_t, path: *c_char,
615                          flags: c_int, cb: uv_fs_cb) -> c_int;
616     pub fn uv_fs_req_cleanup(req: *uv_fs_t);
617     pub fn uv_fs_fsync(handle: *uv_loop_t, req: *uv_fs_t, file: c_int,
618                        cb: uv_fs_cb) -> c_int;
619     pub fn uv_fs_fdatasync(handle: *uv_loop_t, req: *uv_fs_t, file: c_int,
620                            cb: uv_fs_cb) -> c_int;
621     pub fn uv_fs_ftruncate(handle: *uv_loop_t, req: *uv_fs_t, file: c_int,
622                            offset: i64, cb: uv_fs_cb) -> c_int;
623     pub fn uv_fs_readlink(handle: *uv_loop_t, req: *uv_fs_t, file: *c_char,
624                           cb: uv_fs_cb) -> c_int;
625     pub fn uv_fs_symlink(handle: *uv_loop_t, req: *uv_fs_t, src: *c_char,
626                          dst: *c_char, flags: c_int, cb: uv_fs_cb) -> c_int;
627     pub fn uv_fs_rename(handle: *uv_loop_t, req: *uv_fs_t, src: *c_char,
628                         dst: *c_char, cb: uv_fs_cb) -> c_int;
629     pub fn uv_fs_utime(handle: *uv_loop_t, req: *uv_fs_t, path: *c_char,
630                        atime: c_double, mtime: c_double,
631                        cb: uv_fs_cb) -> c_int;
632     pub fn uv_fs_link(handle: *uv_loop_t, req: *uv_fs_t, src: *c_char,
633                       dst: *c_char, cb: uv_fs_cb) -> c_int;
634     pub fn uv_fs_chown(handle: *uv_loop_t, req: *uv_fs_t, src: *c_char,
635                        uid: uv_uid_t, gid: uv_gid_t, cb: uv_fs_cb) -> c_int;
636     pub fn uv_fs_chmod(handle: *uv_loop_t, req: *uv_fs_t, path: *c_char,
637                        mode: c_int, cb: uv_fs_cb) -> c_int;
638     pub fn uv_fs_lstat(handle: *uv_loop_t, req: *uv_fs_t, file: *c_char,
639                        cb: uv_fs_cb) -> c_int;
640
641     // getaddrinfo
642     pub fn uv_getaddrinfo(loop_: *uv_loop_t, req: *uv_getaddrinfo_t,
643                           getaddrinfo_cb: uv_getaddrinfo_cb,
644                           node: *c_char, service: *c_char,
645                           hints: *addrinfo) -> c_int;
646     pub fn uv_freeaddrinfo(ai: *addrinfo);
647
648     // process spawning
649     pub fn uv_spawn(loop_ptr: *uv_loop_t, outptr: *uv_process_t,
650                     options: *uv_process_options_t) -> c_int;
651     pub fn uv_process_kill(p: *uv_process_t, signum: c_int) -> c_int;
652     pub fn uv_kill(pid: c_int, signum: c_int) -> c_int;
653
654     // pipes
655     pub fn uv_pipe_init(l: *uv_loop_t, p: *uv_pipe_t, ipc: c_int) -> c_int;
656     pub fn uv_pipe_open(pipe: *uv_pipe_t, file: c_int) -> c_int;
657     pub fn uv_pipe_bind(pipe: *uv_pipe_t, name: *c_char) -> c_int;
658     pub fn uv_pipe_connect(req: *uv_connect_t, handle: *uv_pipe_t,
659                            name: *c_char, cb: uv_connect_cb);
660
661     // tty
662     pub fn uv_tty_init(l: *uv_loop_t, tty: *uv_tty_t, fd: c_int,
663                        readable: c_int) -> c_int;
664     pub fn uv_tty_set_mode(tty: *uv_tty_t, mode: c_int) -> c_int;
665     pub fn uv_tty_get_winsize(tty: *uv_tty_t, width: *c_int,
666                               height: *c_int) -> c_int;
667
668     // signals
669     pub fn uv_signal_init(loop_: *uv_loop_t, handle: *uv_signal_t) -> c_int;
670     pub fn uv_signal_start(h: *uv_signal_t, cb: uv_signal_cb,
671                            signum: c_int) -> c_int;
672     pub fn uv_signal_stop(handle: *uv_signal_t) -> c_int;
673 }
674
675 // libuv requires other native libraries on various platforms. These are all
676 // listed here (for each platform)
677
678 // libuv doesn't use pthread on windows
679 // android libc (bionic) provides pthread, so no additional link is required
680 #[cfg(not(windows), not(target_os = "android"))]
681 #[link(name = "pthread")]
682 extern {}
683
684 #[cfg(target_os = "linux")]
685 #[link(name = "rt")]
686 extern {}
687
688 #[cfg(target_os = "win32")]
689 #[link(name = "ws2_32")]
690 #[link(name = "psapi")]
691 #[link(name = "iphlpapi")]
692 extern {}
693
694 #[cfg(target_os = "freebsd")]
695 #[link(name = "kvm")]
696 extern {}