text: ﻿/* 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_H
  #define UV_UNIX_H
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <fcntl.h>
  #include <dirent.h>
  
  #include <sys/socket.h>
  #include <netinet/in.h>
  #include <netinet/tcp.h>
  #include <arpa/inet.h>
  #include <netdb.h>  /* MAXHOSTNAMELEN on Solaris */
  
  #include <termios.h>
  #include <pwd.h>
  
  #if !defined(__MVS__)
  #include <semaphore.h>
  #include <sys/param.h> /* MAXHOSTNAMELEN on Linux and the BSDs */
  #endif
  #include <pthread.h>
  #include <signal.h>
  
  #include "uv/threadpool.h"
  
  #if defined(__linux__)
  # include "uv/linux.h"
  #elif defined (__MVS__)
  # include "uv/os390.h"
  #elif defined(_AIX)
  # include "uv/aix.h"
  #elif defined(__sun)
  # include "uv/sunos.h"
  #elif defined(__APPLE__)
  # include "uv/darwin.h"
  #elif defined(__DragonFly__)       || \
        defined(__FreeBSD__)         || \
        defined(__FreeBSD_kernel__)  || \
        defined(__OpenBSD__)         || \
        defined(__NetBSD__)
  # include "uv/bsd.h"
  #elif defined(__PASE__)   || \
        defined(__CYGWIN__) || \
        defined(__MSYS__)   || \
        defined(__GNU__)
  # include "uv/posix.h"
  #endif
  
  #ifndef NI_MAXHOST
  # define NI_MAXHOST 1025
  #endif
  
  #ifndef NI_MAXSERV
  # define NI_MAXSERV 32
  #endif
  
  #ifndef UV_IO_PRIVATE_PLATFORM_FIELDS
  # define UV_IO_PRIVATE_PLATFORM_FIELDS /* empty */
  #endif
  
  struct uv__io_s;
  struct uv_loop_s;
  
  typedef void (*uv__io_cb)(struct uv_loop_s* loop,
                            struct uv__io_s* w,
                            unsigned int events);
  typedef struct uv__io_s uv__io_t;
  
  struct uv__io_s {
    uv__io_cb cb;
    void* pending_queue[2];
    void* watcher_queue[2];
    unsigned int pevents; /* Pending event mask i.e. mask at next tick. */
    unsigned int events;  /* Current event mask. */
    int fd;
    UV_IO_PRIVATE_PLATFORM_FIELDS
  };
  
  #ifndef UV_PLATFORM_SEM_T
  # define UV_PLATFORM_SEM_T sem_t
  #endif
  
  #ifndef UV_PLATFORM_LOOP_FIELDS
  # define UV_PLATFORM_LOOP_FIELDS /* empty */
  #endif
  
  #ifndef UV_PLATFORM_FS_EVENT_FIELDS
  # define UV_PLATFORM_FS_EVENT_FIELDS /* empty */
  #endif
  
  #ifndef UV_STREAM_PRIVATE_PLATFORM_FIELDS
  # define UV_STREAM_PRIVATE_PLATFORM_FIELDS /* empty */
  #endif
  
  /* Note: May be cast to struct iovec. See writev(2). */
  typedef struct uv_buf_t {
    char* base;
    size_t len;
  } uv_buf_t;
  
  typedef int uv_file;
  typedef int uv_os_sock_t;
  typedef int uv_os_fd_t;
  typedef pid_t uv_pid_t;
  
  #define UV_ONCE_INIT PTHREAD_ONCE_INIT
  
  typedef pthread_once_t uv_once_t;
  typedef pthread_t uv_thread_t;
  typedef pthread_mutex_t uv_mutex_t;
  typedef pthread_rwlock_t uv_rwlock_t;
  typedef UV_PLATFORM_SEM_T uv_sem_t;
  typedef pthread_cond_t uv_cond_t;
  typedef pthread_key_t uv_key_t;
  
  /* Note: guard clauses should match uv_barrier_init's in src/unix/thread.c. */
  #if defined(_AIX) || \
      defined(__OpenBSD__) || \
      !defined(PTHREAD_BARRIER_SERIAL_THREAD)
  /* TODO(bnoordhuis) Merge into uv_barrier_t in v2. */
  struct _uv_barrier {
    uv_mutex_t mutex;
    uv_cond_t cond;
    unsigned threshold;
    unsigned in;
    unsigned out;
  };
  
  typedef struct {
    struct _uv_barrier* b;
  # if defined(PTHREAD_BARRIER_SERIAL_THREAD)
    /* TODO(bnoordhuis) Remove padding in v2. */
    char pad[sizeof(pthread_barrier_t) - sizeof(struct _uv_barrier*)];
  # endif
  } uv_barrier_t;
  #else
  typedef pthread_barrier_t uv_barrier_t;
  #endif
  
  /* Platform-specific definitions for uv_spawn support. */
  typedef gid_t uv_gid_t;
  typedef uid_t uv_uid_t;
  
  typedef struct dirent uv__dirent_t;
  
  #define UV_DIR_PRIVATE_FIELDS \
    DIR* dir;
  
  #if defined(DT_UNKNOWN)
  # define HAVE_DIRENT_TYPES
  # if defined(DT_REG)
  #  define UV__DT_FILE DT_REG
  # else
  #  define UV__DT_FILE -1
  # endif
  # if defined(DT_DIR)
  #  define UV__DT_DIR DT_DIR
  # else
  #  define UV__DT_DIR -2
  # endif
  # if defined(DT_LNK)
  #  define UV__DT_LINK DT_LNK
  # else
  #  define UV__DT_LINK -3
  # endif
  # if defined(DT_FIFO)
  #  define UV__DT_FIFO DT_FIFO
  # else
  #  define UV__DT_FIFO -4
  # endif
  # if defined(DT_SOCK)
  #  define UV__DT_SOCKET DT_SOCK
  # else
  #  define UV__DT_SOCKET -5
  # endif
  # if defined(DT_CHR)
  #  define UV__DT_CHAR DT_CHR
  # else
  #  define UV__DT_CHAR -6
  # endif
  # if defined(DT_BLK)
  #  define UV__DT_BLOCK DT_BLK
  # else
  #  define UV__DT_BLOCK -7
  # endif
  #endif
  
  /* Platform-specific definitions for uv_dlopen support. */
  #define UV_DYNAMIC /* empty */
  
  typedef struct {
    void* handle;
    char* errmsg;
  } uv_lib_t;
  
  #define UV_LOOP_PRIVATE_FIELDS                                                \
    unsigned long flags;                                                        \
    int backend_fd;                                                             \
    void* pending_queue[2];                                                     \
    void* watcher_queue[2];                                                     \
    uv__io_t** watchers;                                                        \
    unsigned int nwatchers;                                                     \
    unsigned int nfds;                                                          \
    void* wq[2];                                                                \
    uv_mutex_t wq_mutex;                                                        \
    uv_async_t wq_async;                                                        \
    uv_rwlock_t cloexec_lock;                                                   \
    uv_handle_t* closing_handles;                                               \
    void* process_handles[2];                                                   \
    void* prepare_handles[2];                                                   \
    void* check_handles[2];                                                     \
    void* idle_handles[2];                                                      \
    void* async_handles[2];                                                     \
    void (*async_unused)(void);  /* TODO(bnoordhuis) Remove in libuv v2. */     \
    uv__io_t async_io_watcher;                                                  \
    int async_wfd;                                                              \
    struct {                                                                    \
      void* min;                                                                \
      unsigned int nelts;                                                       \
    } timer_heap;                                                               \
    uint64_t timer_counter;                                                     \
    uint64_t time;                                                              \
    int signal_pipefd[2];                                                       \
    uv__io_t signal_io_watcher;                                                 \
    uv_signal_t child_watcher;                                                  \
    int emfile_fd;                                                              \
    UV_PLATFORM_LOOP_FIELDS                                                     \
  
  #define UV_REQ_TYPE_PRIVATE /* empty */
  
  #define UV_REQ_PRIVATE_FIELDS  /* empty */
  
  #define UV_PRIVATE_REQ_TYPES /* empty */
  
  #define UV_WRITE_PRIVATE_FIELDS                                               \
    void* queue[2];                                                             \
    unsigned int write_index;                                                   \
    uv_buf_t* bufs;                                                             \
    unsigned int nbufs;                                                         \
    int error;                                                                  \
    uv_buf_t bufsml[4];                                                         \
  
  #define UV_CONNECT_PRIVATE_FIELDS                                             \
    void* queue[2];                                                             \
  
  #define UV_SHUTDOWN_PRIVATE_FIELDS /* empty */
  
  #define UV_UDP_SEND_PRIVATE_FIELDS                                            \
    void* queue[2];                                                             \
    struct sockaddr_storage addr;                                               \
    unsigned int nbufs;                                                         \
    uv_buf_t* bufs;                                                             \
    ssize_t status;                                                             \
    uv_udp_send_cb send_cb;                                                     \
    uv_buf_t bufsml[4];                                                         \
  
  #define UV_HANDLE_PRIVATE_FIELDS                                              \
    uv_handle_t* next_closing;                                                  \
    unsigned int flags;                                                         \
  
  #define UV_STREAM_PRIVATE_FIELDS                                              \
    uv_connect_t *connect_req;                                                  \
    uv_shutdown_t *shutdown_req;                                                \
    uv__io_t io_watcher;                                                        \
    void* write_queue[2];                                                       \
    void* write_completed_queue[2];                                             \
    uv_connection_cb connection_cb;                                             \
    int delayed_error;                                                          \
    int accepted_fd;                                                            \
    void* queued_fds;                                                           \
    UV_STREAM_PRIVATE_PLATFORM_FIELDS                                           \
  
  #define UV_TCP_PRIVATE_FIELDS /* empty */
  
  #define UV_UDP_PRIVATE_FIELDS                                                 \
    uv_alloc_cb alloc_cb;                                                       \
    uv_udp_recv_cb recv_cb;                                                     \
    uv__io_t io_watcher;                                                        \
    void* write_queue[2];                                                       \
    void* write_completed_queue[2];                                             \
  
  #define UV_PIPE_PRIVATE_FIELDS                                                \
    const char* pipe_fname; /* strdup'ed */
  
  #define UV_POLL_PRIVATE_FIELDS                                                \
    uv__io_t io_watcher;
  
  #define UV_PREPARE_PRIVATE_FIELDS                                             \
    uv_prepare_cb prepare_cb;                                                   \
    void* queue[2];                                                             \
  
  #define UV_CHECK_PRIVATE_FIELDS                                               \
    uv_check_cb check_cb;                                                       \
    void* queue[2];                                                             \
  
  #define UV_IDLE_PRIVATE_FIELDS                                                \
    uv_idle_cb idle_cb;                                                         \
    void* queue[2];                                                             \
  
  #define UV_ASYNC_PRIVATE_FIELDS                                               \
    uv_async_cb async_cb;                                                       \
    void* queue[2];                                                             \
    int pending;                                                                \
  
  #define UV_TIMER_PRIVATE_FIELDS                                               \
    uv_timer_cb timer_cb;                                                       \
    void* heap_node[3];                                                         \
    uint64_t timeout;                                                           \
    uint64_t repeat;                                                            \
    uint64_t start_id;
  
  #define UV_GETADDRINFO_PRIVATE_FIELDS                                         \
    struct uv__work work_req;                                                   \
    uv_getaddrinfo_cb cb;                                                       \
    struct addrinfo* hints;                                                     \
    char* hostname;                                                             \
    char* service;                                                              \
    struct addrinfo* addrinfo;                                                  \
    int retcode;
  
  #define UV_GETNAMEINFO_PRIVATE_FIELDS                                         \
    struct uv__work work_req;                                                   \
    uv_getnameinfo_cb getnameinfo_cb;                                           \
    struct sockaddr_storage storage;                                            \
    int flags;                                                                  \
    char host[NI_MAXHOST];                                                      \
    char service[NI_MAXSERV];                                                   \
    int retcode;
  
  #define UV_PROCESS_PRIVATE_FIELDS                                             \
    void* queue[2];                                                             \
    int status;                                                                 \
  
  #define UV_FS_PRIVATE_FIELDS                                                  \
    const char *new_path;                                                       \
    uv_file file;                                                               \
    int flags;                                                                  \
    mode_t mode;                                                                \
    unsigned int nbufs;                                                         \
    uv_buf_t* bufs;                                                             \
    off_t off;                                                                  \
    uv_uid_t uid;                                                               \
    uv_gid_t gid;                                                               \
    double atime;                                                               \
    double mtime;                                                               \
    struct uv__work work_req;                                                   \
    uv_buf_t bufsml[4];                                                         \
  
  #define UV_WORK_PRIVATE_FIELDS                                                \
    struct uv__work work_req;
  
  #define UV_TTY_PRIVATE_FIELDS                                                 \
    struct termios orig_termios;                                                \
    int mode;
  
  #define UV_SIGNAL_PRIVATE_FIELDS                                              \
    /* RB_ENTRY(uv_signal_s) tree_entry; */                                     \
    struct {                                                                    \
      struct uv_signal_s* rbe_left;                                             \
      struct uv_signal_s* rbe_right;                                            \
      struct uv_signal_s* rbe_parent;                                           \
      int rbe_color;                                                            \
    } tree_entry;                                                               \
    /* Use two counters here so we don have to fiddle with atomics. */          \
    unsigned int caught_signals;                                                \
    unsigned int dispatched_signals;
  
  #define UV_FS_EVENT_PRIVATE_FIELDS                                            \
    uv_fs_event_cb cb;                                                          \
    UV_PLATFORM_FS_EVENT_FIELDS                                                 \
  
  /* fs open() flags supported on this platform: */
  #if defined(O_APPEND)
  # define UV_FS_O_APPEND       O_APPEND
  #else
  # define UV_FS_O_APPEND       0
  #endif
  #if defined(O_CREAT)
  # define UV_FS_O_CREAT        O_CREAT
  #else
  # define UV_FS_O_CREAT        0
  #endif
  #if defined(O_DIRECT)
  # define UV_FS_O_DIRECT       O_DIRECT
  #else
  # define UV_FS_O_DIRECT       0
  #endif
  #if defined(O_DIRECTORY)
  # define UV_FS_O_DIRECTORY    O_DIRECTORY
  #else
  # define UV_FS_O_DIRECTORY    0
  #endif
  #if defined(O_DSYNC)
  # define UV_FS_O_DSYNC        O_DSYNC
  #else
  # define UV_FS_O_DSYNC        0
  #endif
  #if defined(O_EXCL)
  # define UV_FS_O_EXCL         O_EXCL
  #else
  # define UV_FS_O_EXCL         0
  #endif
  #if defined(O_EXLOCK)
  # define UV_FS_O_EXLOCK       O_EXLOCK
  #else
  # define UV_FS_O_EXLOCK       0
  #endif
  #if defined(O_NOATIME)
  # define UV_FS_O_NOATIME      O_NOATIME
  #else
  # define UV_FS_O_NOATIME      0
  #endif
  #if defined(O_NOCTTY)
  # define UV_FS_O_NOCTTY       O_NOCTTY
  #else
  # define UV_FS_O_NOCTTY       0
  #endif
  #if defined(O_NOFOLLOW)
  # define UV_FS_O_NOFOLLOW     O_NOFOLLOW
  #else
  # define UV_FS_O_NOFOLLOW     0
  #endif
  #if defined(O_NONBLOCK)
  # define UV_FS_O_NONBLOCK     O_NONBLOCK
  #else
  # define UV_FS_O_NONBLOCK     0
  #endif
  #if defined(O_RDONLY)
  # define UV_FS_O_RDONLY       O_RDONLY
  #else
  # define UV_FS_O_RDONLY       0
  #endif
  #if defined(O_RDWR)
  # define UV_FS_O_RDWR         O_RDWR
  #else
  # define UV_FS_O_RDWR         0
  #endif
  #if defined(O_SYMLINK)
  # define UV_FS_O_SYMLINK      O_SYMLINK
  #else
  # define UV_FS_O_SYMLINK      0
  #endif
  #if defined(O_SYNC)
  # define UV_FS_O_SYNC         O_SYNC
  #else
  # define UV_FS_O_SYNC         0
  #endif
  #if defined(O_TRUNC)
  # define UV_FS_O_TRUNC        O_TRUNC
  #else
  # define UV_FS_O_TRUNC        0
  #endif
  #if defined(O_WRONLY)
  # define UV_FS_O_WRONLY       O_WRONLY
  #else
  # define UV_FS_O_WRONLY       0
  #endif
  
  /* fs open() flags supported on other platforms: */
  #define UV_FS_O_RANDOM        0
  #define UV_FS_O_SHORT_LIVED   0
  #define UV_FS_O_SEQUENTIAL    0
  #define UV_FS_O_TEMPORARY     0
  
  #endif /* UV_UNIX_H */
  