CSE2410 Fall 2014 Bounce

/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#ifndef UV_UNIX_INTERNAL_H_

#define UV_UNIX_INTERNAL_H_

#include "uv-common.h"

#include <assert.h>

#include <stdlib.h> /* abort */

#include <string.h> /* strrchr */

#include <fcntl.h>  /* O_CLOEXEC, may be */

#if defined(__STRICT_ANSI__)

# define inline __inline

#endif

#if defined(__linux__)

# include "linux-syscalls.h"

#endif /* __linux__ */

#if defined(__sun)

# include <sys/port.h>

# include <port.h>

#endif /* __sun */

#if defined(__APPLE__) && !TARGET_OS_IPHONE

# include <CoreServices/CoreServices.h>

#endif

#define STATIC_ASSERT(expr)                                                   \

  void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)])

#define ACCESS_ONCE(type, var)                                                \

  (*(volatile type*) &(var))

#define UNREACHABLE()                                                         \

  do {                                                                        \

    assert(0 && "unreachable code");                                          \

    abort();                                                                  \

  }                                                                           \

  while (0)

#define SAVE_ERRNO(block)                                                     \

  do {                                                                        \

    int _saved_errno = errno;                                                 \

    do { block; } while (0);                                                  \

    errno = _saved_errno;                                                     \

  }                                                                           \

  while (0)

/* The __clang__ and __INTEL_COMPILER checks are superfluous because they

 * define __GNUC__. They are here to convey to you, dear reader, that these

 * macros are enabled when compiling with clang or icc.

 */

#if defined(__clang__) ||                                                     \

    defined(__GNUC__) ||                                                      \

    defined(__INTEL_COMPILER) ||                                              \

    defined(__SUNPRO_C)

# define UV_DESTRUCTOR(declaration) __attribute__((destructor)) declaration

# define UV_UNUSED(declaration)     __attribute__((unused)) declaration

#else

# define UV_DESTRUCTOR(declaration) declaration

# define UV_UNUSED(declaration)     declaration

#endif

#if defined(__linux__)

# define UV__POLLIN   UV__EPOLLIN

# define UV__POLLOUT  UV__EPOLLOUT

# define UV__POLLERR  UV__EPOLLERR

# define UV__POLLHUP  UV__EPOLLHUP

#endif

#if defined(__sun)

# define UV__POLLIN   POLLIN

# define UV__POLLOUT  POLLOUT

# define UV__POLLERR  POLLERR

# define UV__POLLHUP  POLLHUP

#endif

#ifndef UV__POLLIN

# define UV__POLLIN   1

#endif

#ifndef UV__POLLOUT

# define UV__POLLOUT  2

#endif

#ifndef UV__POLLERR

# define UV__POLLERR  4

#endif

#ifndef UV__POLLHUP

# define UV__POLLHUP  8

#endif

#if !defined(O_CLOEXEC) && defined(__FreeBSD__)

/*

 * It may be that we are just missing `__POSIX_VISIBLE >= 200809`.

 * Try using fixed value const and give up, if it doesn't work

 */

# define O_CLOEXEC 0x00100000

#endif

typedef struct uv__stream_queued_fds_s uv__stream_queued_fds_t;

/* handle flags */

enum {

  UV_CLOSING              = 0x01,   /* uv_close() called but not finished. */

  UV_CLOSED               = 0x02,   /* close(2) finished. */

  UV_STREAM_READING       = 0x04,   /* uv_read_start() called. */

  UV_STREAM_SHUTTING      = 0x08,   /* uv_shutdown() called but not complete. */

  UV_STREAM_SHUT          = 0x10,   /* Write side closed. */

  UV_STREAM_READABLE      = 0x20,   /* The stream is readable */

  UV_STREAM_WRITABLE      = 0x40,   /* The stream is writable */

  UV_STREAM_BLOCKING      = 0x80,   /* Synchronous writes. */

  UV_STREAM_READ_PARTIAL  = 0x100,  /* read(2) read less than requested. */

  UV_STREAM_READ_EOF      = 0x200,  /* read(2) read EOF. */

  UV_TCP_NODELAY          = 0x400,  /* Disable Nagle. */

  UV_TCP_KEEPALIVE        = 0x800,  /* Turn on keep-alive. */

  UV_TCP_SINGLE_ACCEPT    = 0x1000, /* Only accept() when idle. */

  UV_HANDLE_IPV6          = 0x2000  /* Handle is bound to a IPv6 socket. */

};

typedef enum {

  UV_CLOCK_PRECISE = 0,  /* Use the highest resolution clock available. */

  UV_CLOCK_FAST = 1      /* Use the fastest clock with <= 1ms granularity. */

} uv_clocktype_t;

struct uv__stream_queued_fds_s {

  unsigned int size;

  unsigned int offset;

  int fds[1];

};

/* core */

int uv__nonblock(int fd, int set);

int uv__close(int fd);

int uv__cloexec(int fd, int set);

int uv__socket(int domain, int type, int protocol);

int uv__dup(int fd);

ssize_t uv__recvmsg(int fd, struct msghdr *msg, int flags);

void uv__make_close_pending(uv_handle_t* handle);

void uv__io_init(uv__io_t* w, uv__io_cb cb, int fd);

void uv__io_start(uv_loop_t* loop, uv__io_t* w, unsigned int events);

void uv__io_stop(uv_loop_t* loop, uv__io_t* w, unsigned int events);

void uv__io_close(uv_loop_t* loop, uv__io_t* w);

void uv__io_feed(uv_loop_t* loop, uv__io_t* w);

int uv__io_active(const uv__io_t* w, unsigned int events);

void uv__io_poll(uv_loop_t* loop, int timeout); /* in milliseconds or -1 */

/* async */

void uv__async_send(struct uv__async* wa);

void uv__async_init(struct uv__async* wa);

int uv__async_start(uv_loop_t* loop, struct uv__async* wa, uv__async_cb cb);

void uv__async_stop(uv_loop_t* loop, struct uv__async* wa);

/* loop */

void uv__run_idle(uv_loop_t* loop);

void uv__run_check(uv_loop_t* loop);

void uv__run_prepare(uv_loop_t* loop);

/* stream */

void uv__stream_init(uv_loop_t* loop, uv_stream_t* stream,

    uv_handle_type type);

int uv__stream_open(uv_stream_t*, int fd, int flags);

void uv__stream_destroy(uv_stream_t* stream);

#if defined(__APPLE__)

int uv__stream_try_select(uv_stream_t* stream, int* fd);

#endif /* defined(__APPLE__) */

void uv__server_io(uv_loop_t* loop, uv__io_t* w, unsigned int events);

int uv__accept(int sockfd);

int uv__dup2_cloexec(int oldfd, int newfd);

int uv__open_cloexec(const char* path, int flags);

/* tcp */

int uv_tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb);

int uv__tcp_nodelay(int fd, int on);

int uv__tcp_keepalive(int fd, int on, unsigned int delay);

/* pipe */

int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb);

/* timer */

void uv__run_timers(uv_loop_t* loop);

int uv__next_timeout(const uv_loop_t* loop);

/* signal */

void uv__signal_close(uv_signal_t* handle);

void uv__signal_global_once_init(void);

void uv__signal_loop_cleanup(uv_loop_t* loop);

/* thread pool */

void uv__work_submit(uv_loop_t* loop,

                     struct uv__work *w,

                     void (*work)(struct uv__work *w),

                     void (*done)(struct uv__work *w, int status));

void uv__work_done(uv_async_t* handle);

/* platform specific */

uint64_t uv__hrtime(uv_clocktype_t type);

int uv__kqueue_init(uv_loop_t* loop);

int uv__platform_loop_init(uv_loop_t* loop, int default_loop);

void uv__platform_loop_delete(uv_loop_t* loop);

void uv__platform_invalidate_fd(uv_loop_t* loop, int fd);

/* various */

void uv__async_close(uv_async_t* handle);

void uv__check_close(uv_check_t* handle);

void uv__fs_event_close(uv_fs_event_t* handle);

void uv__idle_close(uv_idle_t* handle);

void uv__pipe_close(uv_pipe_t* handle);

void uv__poll_close(uv_poll_t* handle);

void uv__prepare_close(uv_prepare_t* handle);

void uv__process_close(uv_process_t* handle);

void uv__stream_close(uv_stream_t* handle);

void uv__tcp_close(uv_tcp_t* handle);

void uv__timer_close(uv_timer_t* handle);

void uv__udp_close(uv_udp_t* handle);

void uv__udp_finish_close(uv_udp_t* handle);

uv_handle_type uv__handle_type(int fd);

#if defined(__APPLE__)

int uv___stream_fd(uv_stream_t* handle);

#define uv__stream_fd(handle) (uv___stream_fd((uv_stream_t*) (handle)))

#else

#define uv__stream_fd(handle) ((handle)->io_watcher.fd)

#endif /* defined(__APPLE__) */

#ifdef UV__O_NONBLOCK

# define UV__F_NONBLOCK UV__O_NONBLOCK

#else

# define UV__F_NONBLOCK 1

#endif

int uv__make_socketpair(int fds[2], int flags);

int uv__make_pipe(int fds[2], int flags);

#if defined(__APPLE__)

int uv__fsevents_init(uv_fs_event_t* handle);

int uv__fsevents_close(uv_fs_event_t* handle);

void uv__fsevents_loop_delete(uv_loop_t* loop);

/* OSX < 10.7 has no file events, polyfill them */

#ifndef MAC_OS_X_VERSION_10_7

static const int kFSEventStreamCreateFlagFileEvents = 0x00000010;

static const int kFSEventStreamEventFlagItemCreated = 0x00000100;

static const int kFSEventStreamEventFlagItemRemoved = 0x00000200;

static const int kFSEventStreamEventFlagItemInodeMetaMod = 0x00000400;

static const int kFSEventStreamEventFlagItemRenamed = 0x00000800;

static const int kFSEventStreamEventFlagItemModified = 0x00001000;

static const int kFSEventStreamEventFlagItemFinderInfoMod = 0x00002000;

static const int kFSEventStreamEventFlagItemChangeOwner = 0x00004000;

static const int kFSEventStreamEventFlagItemXattrMod = 0x00008000;

static const int kFSEventStreamEventFlagItemIsFile = 0x00010000;

static const int kFSEventStreamEventFlagItemIsDir = 0x00020000;

static const int kFSEventStreamEventFlagItemIsSymlink = 0x00040000;

#endif /* __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070 */

#endif /* defined(__APPLE__) */

UV_UNUSED(static void uv__req_init(uv_loop_t* loop,

                                   uv_req_t* req,

                                   uv_req_type type)) {

  req->type = type;

  uv__req_register(loop, req);

}

#define uv__req_init(loop, req, type) \

  uv__req_init((loop), (uv_req_t*)(req), (type))

UV_UNUSED(static void uv__update_time(uv_loop_t* loop)) {

  /* Use a fast time source if available.  We only need millisecond precision.

   */

  loop->time = uv__hrtime(UV_CLOCK_FAST) / 1000000;

}

UV_UNUSED(static char* uv__basename_r(const char* path)) {

  char* s;

  s = strrchr(path, '/');

  if (s == NULL)

    return (char*) path;

  return s + 1;

}

#ifdef HAVE_DTRACE

#include "uv-dtrace.h"

#else

#define UV_TICK_START(arg0, arg1)

#define UV_TICK_STOP(arg0, arg1)

#endif

#endif /* UV_UNIX_INTERNAL_H_ */