/* 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. */ /* See uv_loop_new for an introduction. */ #ifndef UV_H #define UV_H #ifdef __cplusplus extern "C" { #endif #ifdef _WIN32 /* Windows - set up dll import/export decorators. */ # if defined(BUILDING_UV_SHARED) /* Building shared library. Export everything from c-ares as well. */ # define UV_EXTERN __declspec(dllexport) # define CARES_BUILDING_LIBRARY 1 # elif defined(USING_UV_SHARED) /* Using shared library. Use shared c-ares as well. */ # define UV_EXTERN __declspec(dllimport) # else /* Building static library. Build c-ares statically as well. */ # define UV_EXTERN /* nothing */ # define CARES_STATICLIB 1 # endif #else /* Unix. TODO: symbol hiding */ # define UV_EXTERN /* nothing */ #endif #define UV_VERSION_MAJOR 0 #define UV_VERSION_MINOR 6 #include /* int64_t */ #include /* size_t */ #include "ares.h" #ifndef _SSIZE_T_ typedef intptr_t ssize_t; #endif #if defined(__unix__) || defined(__POSIX__) || defined(__APPLE__) # include "uv-private/uv-unix.h" #else # include "uv-private/uv-win.h" #endif /* Expand this list if necessary. */ #define UV_ERRNO_MAP(XX) \ XX( -1, UNKNOWN, "unknown error") \ XX( 0, OK, "success") \ XX( 1, EOF, "end of file") \ XX( 2, EADDRINFO, "getaddrinfo error") \ XX( 3, EACCES, "permission denied") \ XX( 4, EAGAIN, "no more processes") \ XX( 5, EADDRINUSE, "address already in use") \ XX( 6, EADDRNOTAVAIL, "") \ XX( 7, EAFNOSUPPORT, "") \ XX( 8, EALREADY, "") \ XX( 9, EBADF, "bad file descriptor") \ XX( 10, EBUSY, "mount device busy") \ XX( 11, ECONNABORTED, "software caused connection abort") \ XX( 12, ECONNREFUSED, "connection refused") \ XX( 13, ECONNRESET, "connection reset by peer") \ XX( 14, EDESTADDRREQ, "destination address required") \ XX( 15, EFAULT, "bad address in system call argument") \ XX( 16, EHOSTUNREACH, "host is unreachable") \ XX( 17, EINTR, "interrupted system call") \ XX( 18, EINVAL, "invalid argument") \ XX( 19, EISCONN, "socket is already connected") \ XX( 20, EMFILE, "too many open files") \ XX( 21, EMSGSIZE, "message too long") \ XX( 22, ENETDOWN, "network is down") \ XX( 23, ENETUNREACH, "network is unreachable") \ XX( 24, ENFILE, "file table overflow") \ XX( 25, ENOBUFS, "no buffer space available") \ XX( 26, ENOMEM, "not enough memory") \ XX( 27, ENOTDIR, "not a directory") \ XX( 28, EISDIR, "illegal operation on a directory") \ XX( 29, ENONET, "machine is not on the network") \ XX( 31, ENOTCONN, "socket is not connected") \ XX( 32, ENOTSOCK, "socket operation on non-socket") \ XX( 33, ENOTSUP, "operation not supported on socket") \ XX( 34, ENOENT, "no such file or directory") \ XX( 35, ENOSYS, "function not implemented") \ XX( 36, EPIPE, "broken pipe") \ XX( 37, EPROTO, "protocol error") \ XX( 38, EPROTONOSUPPORT, "protocol not suppored") \ XX( 39, EPROTOTYPE, "protocol wrong type for socket") \ XX( 40, ETIMEDOUT, "connection timed out") \ XX( 41, ECHARSET, "") \ XX( 42, EAIFAMNOSUPPORT, "") \ XX( 44, EAISERVICE, "") \ XX( 45, EAISOCKTYPE, "") \ XX( 46, ESHUTDOWN, "") \ XX( 47, EEXIST, "file already exists") \ XX( 48, ESRCH, "no such process") #define UV_ERRNO_GEN(val, name, s) UV_##name = val, typedef enum { UV_ERRNO_MAP(UV_ERRNO_GEN) UV_MAX_ERRORS } uv_err_code; #undef UV_ERRNO_GEN typedef enum { UV_UNKNOWN_HANDLE = 0, UV_TCP, UV_UDP, UV_NAMED_PIPE, UV_TTY, UV_FILE, UV_TIMER, UV_PREPARE, UV_CHECK, UV_IDLE, UV_ASYNC, UV_ARES_TASK, UV_ARES_EVENT, UV_PROCESS, UV_FS_EVENT } uv_handle_type; typedef enum { UV_UNKNOWN_REQ = 0, UV_CONNECT, UV_ACCEPT, UV_READ, UV_WRITE, UV_SHUTDOWN, UV_WAKEUP, UV_UDP_SEND, UV_FS, UV_WORK, UV_GETADDRINFO, UV_REQ_TYPE_PRIVATE } uv_req_type; typedef struct uv_loop_s uv_loop_t; typedef struct uv_ares_task_s uv_ares_task_t; typedef struct uv_err_s uv_err_t; typedef struct uv_handle_s uv_handle_t; typedef struct uv_stream_s uv_stream_t; typedef struct uv_tcp_s uv_tcp_t; typedef struct uv_udp_s uv_udp_t; typedef struct uv_pipe_s uv_pipe_t; typedef struct uv_tty_s uv_tty_t; typedef struct uv_timer_s uv_timer_t; typedef struct uv_prepare_s uv_prepare_t; typedef struct uv_check_s uv_check_t; typedef struct uv_idle_s uv_idle_t; typedef struct uv_async_s uv_async_t; typedef struct uv_getaddrinfo_s uv_getaddrinfo_t; typedef struct uv_process_s uv_process_t; typedef struct uv_counters_s uv_counters_t; /* Request types */ typedef struct uv_req_s uv_req_t; typedef struct uv_shutdown_s uv_shutdown_t; typedef struct uv_write_s uv_write_t; typedef struct uv_connect_s uv_connect_t; typedef struct uv_udp_send_s uv_udp_send_t; typedef struct uv_fs_s uv_fs_t; /* uv_fs_event_t is a subclass of uv_handle_t. */ typedef struct uv_fs_event_s uv_fs_event_t; typedef struct uv_work_s uv_work_t; /* * This function must be called before any other functions in libuv. * * All functions besides uv_run() are non-blocking. * * All callbacks in libuv are made asynchronously. That is they are never * made by the function that takes them as a parameter. */ UV_EXTERN uv_loop_t* uv_loop_new(void); UV_EXTERN void uv_loop_delete(uv_loop_t*); /* * Returns the default loop. */ UV_EXTERN uv_loop_t* uv_default_loop(void); /* * This function starts the event loop. It blocks until the reference count * of the loop drops to zero. */ UV_EXTERN int uv_run (uv_loop_t*); /* * Manually modify the event loop's reference count. Useful if the user wants * to have a handle or timeout that doesn't keep the loop alive. */ UV_EXTERN void uv_ref(uv_loop_t*); UV_EXTERN void uv_unref(uv_loop_t*); UV_EXTERN void uv_update_time(uv_loop_t*); UV_EXTERN int64_t uv_now(uv_loop_t*); /* * The status parameter is 0 if the request completed successfully, * and should be -1 if the request was cancelled or failed. * For uv_close_cb, -1 means that the handle was closed due to an error. * Error details can be obtained by calling uv_last_error(). * * In the case of uv_read_cb the uv_buf_t returned should be freed by the * user. */ typedef uv_buf_t (*uv_alloc_cb)(uv_handle_t* handle, size_t suggested_size); typedef void (*uv_read_cb)(uv_stream_t* stream, ssize_t nread, uv_buf_t buf); /* * Just like the uv_read_cb except that if the pending parameter is true * then you can use uv_accept() to pull the new handle into the process. * If no handle is pending then pending will be UV_UNKNOWN_HANDLE. */ typedef void (*uv_read2_cb)(uv_pipe_t* pipe, ssize_t nread, uv_buf_t buf, uv_handle_type pending); typedef void (*uv_write_cb)(uv_write_t* req, int status); typedef void (*uv_connect_cb)(uv_connect_t* req, int status); typedef void (*uv_shutdown_cb)(uv_shutdown_t* req, int status); typedef void (*uv_connection_cb)(uv_stream_t* server, int status); typedef void (*uv_close_cb)(uv_handle_t* handle); typedef void (*uv_timer_cb)(uv_timer_t* handle, int status); /* TODO: do these really need a status argument? */ typedef void (*uv_async_cb)(uv_async_t* handle, int status); typedef void (*uv_prepare_cb)(uv_prepare_t* handle, int status); typedef void (*uv_check_cb)(uv_check_t* handle, int status); typedef void (*uv_idle_cb)(uv_idle_t* handle, int status); typedef void (*uv_getaddrinfo_cb)(uv_getaddrinfo_t* handle, int status, struct addrinfo* res); typedef void (*uv_exit_cb)(uv_process_t*, int exit_status, int term_signal); typedef void (*uv_fs_cb)(uv_fs_t* req); typedef void (*uv_work_cb)(uv_work_t* req); typedef void (*uv_after_work_cb)(uv_work_t* req); /* * This will be called repeatedly after the uv_fs_event_t is initialized. * If uv_fs_event_t was initialized with a directory the filename parameter * will be a relative path to a file contained in the directory. * The events paramenter is an ORed mask of enum uv_fs_event elements. */ typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle, const char* filename, int events, int status); typedef enum { UV_LEAVE_GROUP = 0, UV_JOIN_GROUP } uv_membership; struct uv_err_s { /* read-only */ uv_err_code code; /* private */ int sys_errno_; }; /* * Most functions return boolean: 0 for success and -1 for failure. * On error the user should then call uv_last_error() to determine * the error code. */ UV_EXTERN uv_err_t uv_last_error(uv_loop_t*); UV_EXTERN const char* uv_strerror(uv_err_t err); UV_EXTERN const char* uv_err_name(uv_err_t err); #define UV_REQ_FIELDS \ /* read-only */ \ uv_req_type type; \ /* public */ \ void* data; \ /* private */ \ UV_REQ_PRIVATE_FIELDS /* Abstract base class of all requests. */ struct uv_req_s { UV_REQ_FIELDS }; /* Platform-specific request types */ UV_PRIVATE_REQ_TYPES /* * uv_shutdown_t is a subclass of uv_req_t * * Shutdown the outgoing (write) side of a duplex stream. It waits for * pending write requests to complete. The handle should refer to a * initialized stream. req should be an uninitalized shutdown request * struct. The cb is a called after shutdown is complete. */ UV_EXTERN int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, uv_shutdown_cb cb); struct uv_shutdown_s { UV_REQ_FIELDS uv_stream_t* handle; uv_shutdown_cb cb; UV_SHUTDOWN_PRIVATE_FIELDS }; #define UV_HANDLE_FIELDS \ /* read-only */ \ uv_loop_t* loop; \ uv_handle_type type; \ /* public */ \ uv_close_cb close_cb; \ void* data; \ /* private */ \ UV_HANDLE_PRIVATE_FIELDS /* The abstract base class of all handles. */ struct uv_handle_s { UV_HANDLE_FIELDS }; /* * Returns 1 if the prepare/check/idle handle has been started, 0 otherwise. * For other handle types this always returns 1. */ UV_EXTERN int uv_is_active(uv_handle_t* handle); /* * Request handle to be closed. close_cb will be called asynchronously after * this call. This MUST be called on each handle before memory is released. * * Note that handles that wrap file descriptors are closed immediately but * close_cb will still be deferred to the next iteration of the event loop. * It gives you a chance to free up any resources associated with the handle. */ UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb); /* * Constructor for uv_buf_t. * Due to platform differences the user cannot rely on the ordering of the * base and len members of the uv_buf_t struct. The user is responsible for * freeing base after the uv_buf_t is done. Return struct passed by value. */ UV_EXTERN uv_buf_t uv_buf_init(char* base, size_t len); #define UV_STREAM_FIELDS \ /* number of bytes queued for writing */ \ size_t write_queue_size; \ uv_alloc_cb alloc_cb; \ uv_read_cb read_cb; \ uv_read2_cb read2_cb; \ /* private */ \ UV_STREAM_PRIVATE_FIELDS /* * uv_stream_t is a subclass of uv_handle_t * * uv_stream is an abstract class. * * uv_stream_t is the parent class of uv_tcp_t, uv_pipe_t, uv_tty_t, and * soon uv_file_t. */ struct uv_stream_s { UV_HANDLE_FIELDS UV_STREAM_FIELDS }; UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb); /* * This call is used in conjunction with uv_listen() to accept incoming * connections. Call uv_accept after receiving a uv_connection_cb to accept * the connection. Before calling uv_accept use uv_*_init() must be * called on the client. Non-zero return value indicates an error. * * When the uv_connection_cb is called it is guaranteed that uv_accept will * complete successfully the first time. If you attempt to use it more than * once, it may fail. It is suggested to only call uv_accept once per * uv_connection_cb call. */ UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client); /* * Read data from an incoming stream. The callback will be made several * several times until there is no more data to read or uv_read_stop is * called. When we've reached EOF nread will be set to -1 and the error is * set to UV_EOF. When nread == -1 the buf parameter might not point to a * valid buffer; in that case buf.len and buf.base are both set to 0. * Note that nread might also be 0, which does *not* indicate an error or * eof; it happens when libuv requested a buffer through the alloc callback * but then decided that it didn't need that buffer. */ UV_EXTERN int uv_read_start(uv_stream_t*, uv_alloc_cb alloc_cb, uv_read_cb read_cb); UV_EXTERN int uv_read_stop(uv_stream_t*); /* * Extended read methods for receiving handles over a pipe. The pipe must be * initialized with ipc == 1. */ UV_EXTERN int uv_read2_start(uv_stream_t*, uv_alloc_cb alloc_cb, uv_read2_cb read_cb); /* * Write data to stream. Buffers are written in order. Example: * * uv_buf_t a[] = { * { .base = "1", .len = 1 }, * { .base = "2", .len = 1 } * }; * * uv_buf_t b[] = { * { .base = "3", .len = 1 }, * { .base = "4", .len = 1 } * }; * * // writes "1234" * uv_write(req, stream, a, 2); * uv_write(req, stream, b, 2); * */ UV_EXTERN int uv_write(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[], int bufcnt, uv_write_cb cb); UV_EXTERN int uv_write2(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[], int bufcnt, uv_stream_t* send_handle, uv_write_cb cb); /* uv_write_t is a subclass of uv_req_t */ struct uv_write_s { UV_REQ_FIELDS uv_write_cb cb; uv_stream_t* send_handle; uv_stream_t* handle; UV_WRITE_PRIVATE_FIELDS }; /* * uv_tcp_t is a subclass of uv_stream_t * * Represents a TCP stream or TCP server. */ struct uv_tcp_s { UV_HANDLE_FIELDS UV_STREAM_FIELDS UV_TCP_PRIVATE_FIELDS }; UV_EXTERN int uv_tcp_init(uv_loop_t*, uv_tcp_t* handle); /* Enable/disable Nagle's algorithm. */ UV_EXTERN int uv_tcp_nodelay(uv_tcp_t* handle, int enable); /* Enable/disable TCP keep-alive. * * `ms` is the initial delay in seconds, ignored when `enable` is zero. */ UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle, int enable, unsigned int delay); /* * This setting applies to Windows only. * Enable/disable simultaneous asynchronous accept requests that are * queued by the operating system when listening for new tcp connections. * This setting is used to tune a tcp server for the desired performance. * Having simultaneous accepts can significantly improve the rate of * accepting connections (which is why it is enabled by default). */ UV_EXTERN int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable); UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in); UV_EXTERN int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6); UV_EXTERN int uv_tcp_getsockname(uv_tcp_t* handle, struct sockaddr* name, int* namelen); UV_EXTERN int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name, int* namelen); /* * uv_tcp_connect, uv_tcp_connect6 * These functions establish IPv4 and IPv6 TCP connections. Provide an * initialized TCP handle and an uninitialized uv_connect_t*. The callback * will be made when the connection is estabished. */ UV_EXTERN int uv_tcp_connect(uv_connect_t* req, uv_tcp_t* handle, struct sockaddr_in address, uv_connect_cb cb); UV_EXTERN int uv_tcp_connect6(uv_connect_t* req, uv_tcp_t* handle, struct sockaddr_in6 address, uv_connect_cb cb); /* uv_connect_t is a subclass of uv_req_t */ struct uv_connect_s { UV_REQ_FIELDS uv_connect_cb cb; uv_stream_t* handle; UV_CONNECT_PRIVATE_FIELDS }; /* * UDP support. */ enum uv_udp_flags { /* Disables dual stack mode. Used with uv_udp_bind6(). */ UV_UDP_IPV6ONLY = 1, /* * Indicates message was truncated because read buffer was too small. The * remainder was discarded by the OS. Used in uv_udp_recv_cb. */ UV_UDP_PARTIAL = 2 }; /* * Called after a uv_udp_send() or uv_udp_send6(). status 0 indicates * success otherwise error. */ typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status); /* * Callback that is invoked when a new UDP datagram is received. * * handle UDP handle. * nread Number of bytes that have been received. * 0 if there is no more data to read. You may * discard or repurpose the read buffer. * -1 if a transmission error was detected. * buf uv_buf_t with the received data. * addr struct sockaddr_in or struct sockaddr_in6. * Valid for the duration of the callback only. * flags One or more OR'ed UV_UDP_* constants. * Right now only UV_UDP_PARTIAL is used. */ typedef void (*uv_udp_recv_cb)(uv_udp_t* handle, ssize_t nread, uv_buf_t buf, struct sockaddr* addr, unsigned flags); /* uv_udp_t is a subclass of uv_handle_t */ struct uv_udp_s { UV_HANDLE_FIELDS UV_UDP_PRIVATE_FIELDS }; /* uv_udp_send_t is a subclass of uv_req_t */ struct uv_udp_send_s { UV_REQ_FIELDS uv_udp_t* handle; uv_udp_send_cb cb; UV_UDP_SEND_PRIVATE_FIELDS }; /* * Initialize a new UDP handle. The actual socket is created lazily. * Returns 0 on success. */ UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle); /* * Bind to a IPv4 address and port. * * Arguments: * handle UDP handle. Should have been initialized with `uv_udp_init`. * addr struct sockaddr_in with the address and port to bind to. * flags Unused. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr, unsigned flags); /* * Bind to a IPv6 address and port. * * Arguments: * handle UDP handle. Should have been initialized with `uv_udp_init`. * addr struct sockaddr_in with the address and port to bind to. * flags Should be 0 or UV_UDP_IPV6ONLY. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr, unsigned flags); UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name, int* namelen); /* * Set membership for a multicast address * * Arguments: * handle UDP handle. Should have been initialized with * `uv_udp_init`. * multicast_addr multicast address to set membership for * interface_addr interface address * membership Should be UV_JOIN_GROUP or UV_LEAVE_GROUP * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle, const char* multicast_addr, const char* interface_addr, uv_membership membership); /* * Send data. If the socket has not previously been bound with `uv_udp_bind` * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) * and a random port number. * * Arguments: * req UDP request handle. Need not be initialized. * handle UDP handle. Should have been initialized with `uv_udp_init`. * bufs List of buffers to send. * bufcnt Number of buffers in `bufs`. * addr Address of the remote peer. See `uv_ip4_addr`. * send_cb Callback to invoke when the data has been sent out. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_send(uv_udp_send_t* req, uv_udp_t* handle, uv_buf_t bufs[], int bufcnt, struct sockaddr_in addr, uv_udp_send_cb send_cb); /* * Send data. If the socket has not previously been bound with `uv_udp_bind6`, * it is bound to ::0 (the "all interfaces" address) and a random port number. * * Arguments: * req UDP request handle. Need not be initialized. * handle UDP handle. Should have been initialized with `uv_udp_init`. * bufs List of buffers to send. * bufcnt Number of buffers in `bufs`. * addr Address of the remote peer. See `uv_ip6_addr`. * send_cb Callback to invoke when the data has been sent out. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_send6(uv_udp_send_t* req, uv_udp_t* handle, uv_buf_t bufs[], int bufcnt, struct sockaddr_in6 addr, uv_udp_send_cb send_cb); /* * Receive data. If the socket has not previously been bound with `uv_udp_bind` * or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address) * and a random port number. * * Arguments: * handle UDP handle. Should have been initialized with `uv_udp_init`. * alloc_cb Callback to invoke when temporary storage is needed. * recv_cb Callback to invoke with received data. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb, uv_udp_recv_cb recv_cb); /* * Stop listening for incoming datagrams. * * Arguments: * handle UDP handle. Should have been initialized with `uv_udp_init`. * * Returns: * 0 on success, -1 on error. */ UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle); /* * uv_tty_t is a subclass of uv_stream_t * * Representing a stream for the console. */ struct uv_tty_s { UV_HANDLE_FIELDS UV_STREAM_FIELDS UV_TTY_PRIVATE_FIELDS }; /* * Initialize a new TTY stream with the given file descriptor. Usually the * file descriptor will be * 0 = stdin * 1 = stdout * 2 = stderr * The last argument, readable, specifies if you plan on calling * uv_read_start with this stream. stdin is readable, stdout is not. * * TTY streams which are not readable have blocking writes. */ UV_EXTERN int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable); /* * Set mode. 0 for normal, 1 for raw. */ UV_EXTERN int uv_tty_set_mode(uv_tty_t*, int mode); /* * To be called when the program exits. Resets TTY settings to default * values for the next process to take over. */ UV_EXTERN void uv_tty_reset_mode(void); /* * Gets the current Window size. On success zero is returned. */ UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height); /* * Used to detect what type of stream should be used with a given file * descriptor. Usually this will be used during initialization to guess the * type of the stdio streams. * For isatty() functionality use this function and test for UV_TTY. */ UV_EXTERN uv_handle_type uv_guess_handle(uv_file file); /* * uv_pipe_t is a subclass of uv_stream_t * * Representing a pipe stream or pipe server. On Windows this is a Named * Pipe. On Unix this is a UNIX domain socket. */ struct uv_pipe_s { UV_HANDLE_FIELDS UV_STREAM_FIELDS UV_PIPE_PRIVATE_FIELDS int ipc; /* non-zero if this pipe is used for passing handles */ }; /* * Initialize a pipe. The last argument is a boolean to indicate if * this pipe will be used for handle passing between processes. */ UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc); /* * Opens an existing file descriptor or HANDLE as a pipe. */ UV_EXTERN void uv_pipe_open(uv_pipe_t*, uv_file file); UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name); UV_EXTERN void uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle, const char* name, uv_connect_cb cb); /* * uv_prepare_t is a subclass of uv_handle_t. * * libev wrapper. Every active prepare handle gets its callback called * exactly once per loop iteration, just before the system blocks to wait * for completed i/o. */ struct uv_prepare_s { UV_HANDLE_FIELDS UV_PREPARE_PRIVATE_FIELDS }; UV_EXTERN int uv_prepare_init(uv_loop_t*, uv_prepare_t* prepare); UV_EXTERN int uv_prepare_start(uv_prepare_t* prepare, uv_prepare_cb cb); UV_EXTERN int uv_prepare_stop(uv_prepare_t* prepare); /* * uv_check_t is a subclass of uv_handle_t. * * libev wrapper. Every active check handle gets its callback called exactly * once per loop iteration, just after the system returns from blocking. */ struct uv_check_s { UV_HANDLE_FIELDS UV_CHECK_PRIVATE_FIELDS }; UV_EXTERN int uv_check_init(uv_loop_t*, uv_check_t* check); UV_EXTERN int uv_check_start(uv_check_t* check, uv_check_cb cb); UV_EXTERN int uv_check_stop(uv_check_t* check); /* * uv_idle_t is a subclass of uv_handle_t. * * libev wrapper. Every active idle handle gets its callback called * repeatedly until it is stopped. This happens after all other types of * callbacks are processed. When there are multiple "idle" handles active, * their callbacks are called in turn. */ struct uv_idle_s { UV_HANDLE_FIELDS UV_IDLE_PRIVATE_FIELDS }; UV_EXTERN int uv_idle_init(uv_loop_t*, uv_idle_t* idle); UV_EXTERN int uv_idle_start(uv_idle_t* idle, uv_idle_cb cb); UV_EXTERN int uv_idle_stop(uv_idle_t* idle); /* * uv_async_t is a subclass of uv_handle_t. * * libev wrapper. uv_async_send wakes up the event * loop and calls the async handle's callback There is no guarantee that * every uv_async_send call leads to exactly one invocation of the callback; * The only guarantee is that the callback function is called at least once * after the call to async_send. Unlike all other libuv functions, * uv_async_send can be called from another thread. */ struct uv_async_s { UV_HANDLE_FIELDS UV_ASYNC_PRIVATE_FIELDS }; UV_EXTERN int uv_async_init(uv_loop_t*, uv_async_t* async, uv_async_cb async_cb); /* * This can be called from other threads to wake up a libuv thread. * * libuv is single threaded at the moment. */ UV_EXTERN int uv_async_send(uv_async_t* async); /* * uv_timer_t is a subclass of uv_handle_t. * * Wraps libev's ev_timer watcher. Used to get woken up at a specified time * in the future. */ struct uv_timer_s { UV_HANDLE_FIELDS UV_TIMER_PRIVATE_FIELDS }; UV_EXTERN int uv_timer_init(uv_loop_t*, uv_timer_t* timer); UV_EXTERN int uv_timer_start(uv_timer_t* timer, uv_timer_cb cb, int64_t timeout, int64_t repeat); UV_EXTERN int uv_timer_stop(uv_timer_t* timer); /* * Stop the timer, and if it is repeating restart it using the repeat value * as the timeout. If the timer has never been started before it returns -1 and * sets the error to UV_EINVAL. */ UV_EXTERN int uv_timer_again(uv_timer_t* timer); /* * Set the repeat value. Note that if the repeat value is set from a timer * callback it does not immediately take effect. If the timer was nonrepeating * before, it will have been stopped. If it was repeating, then the old repeat * value will have been used to schedule the next timeout. */ UV_EXTERN void uv_timer_set_repeat(uv_timer_t* timer, int64_t repeat); UV_EXTERN int64_t uv_timer_get_repeat(uv_timer_t* timer); /* c-ares integration initialize and terminate */ UV_EXTERN int uv_ares_init_options(uv_loop_t*, ares_channel *channelptr, struct ares_options *options, int optmask); /* TODO remove the loop argument from this function? */ UV_EXTERN void uv_ares_destroy(uv_loop_t*, ares_channel channel); /* * uv_getaddrinfo_t is a subclass of uv_req_t * * Request object for uv_getaddrinfo. */ struct uv_getaddrinfo_s { UV_REQ_FIELDS /* read-only */ uv_loop_t* loop; \ UV_GETADDRINFO_PRIVATE_FIELDS }; /* * Asynchronous getaddrinfo(3). * * Return code 0 means that request is accepted and callback will be called * with result. Other return codes mean that there will not be a callback. * Input arguments may be released after return from this call. * * uv_freeaddrinfo() must be called after completion to free the addrinfo * structure. * * On error NXDOMAIN the status code will be non-zero and UV_ENOENT returned. */ UV_EXTERN int uv_getaddrinfo(uv_loop_t*, uv_getaddrinfo_t* handle, uv_getaddrinfo_cb getaddrinfo_cb, const char* node, const char* service, const struct addrinfo* hints); UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai); /* uv_spawn() options */ typedef struct uv_process_options_s { uv_exit_cb exit_cb; /* Called after the process exits. */ const char* file; /* Path to program to execute. */ /* * Command line arguments. args[0] should be the path to the program. On * Windows this uses CreateProcess which concatinates the arguments into a * string this can cause some strange errors. See the note at * windows_verbatim_arguments. */ char** args; /* * This will be set as the environ variable in the subprocess. If this is * NULL then the parents environ will be used. */ char** env; /* * If non-null this represents a directory the subprocess should execute * in. Stands for current working directory. */ char* cwd; /* * TODO describe how this works. */ int windows_verbatim_arguments; /* * The user should supply pointers to initialized uv_pipe_t structs for * stdio. This is used to to send or receive input from the subprocess. * The user is reponsible for calling uv_close on them. */ uv_pipe_t* stdin_stream; uv_pipe_t* stdout_stream; uv_pipe_t* stderr_stream; } uv_process_options_t; /* * uv_process_t is a subclass of uv_handle_t */ struct uv_process_s { UV_HANDLE_FIELDS uv_exit_cb exit_cb; int pid; UV_PROCESS_PRIVATE_FIELDS }; /* Initializes uv_process_t and starts the process. */ UV_EXTERN int uv_spawn(uv_loop_t*, uv_process_t*, uv_process_options_t options); /* * Kills the process with the specified signal. The user must still * call uv_close on the process. */ UV_EXTERN int uv_process_kill(uv_process_t*, int signum); /* Kills the process with the specified signal. */ UV_EXTERN uv_err_t uv_kill(int pid, int signum); /* * uv_work_t is a subclass of uv_req_t */ struct uv_work_s { UV_REQ_FIELDS uv_loop_t* loop; uv_work_cb work_cb; uv_after_work_cb after_work_cb; UV_WORK_PRIVATE_FIELDS }; /* Queues a work request to execute asynchronously on the thread pool. */ UV_EXTERN int uv_queue_work(uv_loop_t* loop, uv_work_t* req, uv_work_cb work_cb, uv_after_work_cb after_work_cb); /* * File System Methods. * * The uv_fs_* functions execute a blocking system call asynchronously (in a * thread pool) and call the specified callback in the specified loop after * completion. If the user gives NULL as the callback the blocking system * call will be called synchronously. req should be a pointer to an * uninitialized uv_fs_t object. * * uv_fs_req_cleanup() must be called after completion of the uv_fs_ * function to free any internal memory allocations associted with the * request. */ typedef enum { UV_FS_UNKNOWN = -1, UV_FS_CUSTOM, UV_FS_OPEN, UV_FS_CLOSE, UV_FS_READ, UV_FS_WRITE, UV_FS_SENDFILE, UV_FS_STAT, UV_FS_LSTAT, UV_FS_FSTAT, UV_FS_FTRUNCATE, UV_FS_UTIME, UV_FS_FUTIME, UV_FS_CHMOD, UV_FS_FCHMOD, UV_FS_FSYNC, UV_FS_FDATASYNC, UV_FS_UNLINK, UV_FS_RMDIR, UV_FS_MKDIR, UV_FS_RENAME, UV_FS_READDIR, UV_FS_LINK, UV_FS_SYMLINK, UV_FS_READLINK, UV_FS_CHOWN, UV_FS_FCHOWN } uv_fs_type; /* uv_fs_t is a subclass of uv_req_t */ struct uv_fs_s { UV_REQ_FIELDS uv_loop_t* loop; uv_fs_type fs_type; uv_fs_cb cb; ssize_t result; void* ptr; char* path; int errorno; UV_FS_PRIVATE_FIELDS }; UV_EXTERN void uv_fs_req_cleanup(uv_fs_t* req); UV_EXTERN int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb); UV_EXTERN int uv_fs_open(uv_loop_t* loop, uv_fs_t* req, const char* path, int flags, int mode, uv_fs_cb cb); UV_EXTERN int uv_fs_read(uv_loop_t* loop, uv_fs_t* req, uv_file file, void* buf, size_t length, off_t offset, uv_fs_cb cb); UV_EXTERN int uv_fs_unlink(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb); UV_EXTERN int uv_fs_write(uv_loop_t* loop, uv_fs_t* req, uv_file file, void* buf, size_t length, off_t offset, uv_fs_cb cb); UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path, int mode, uv_fs_cb cb); UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb); UV_EXTERN int uv_fs_readdir(uv_loop_t* loop, uv_fs_t* req, const char* path, int flags, uv_fs_cb cb); UV_EXTERN int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb); UV_EXTERN int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb); UV_EXTERN int uv_fs_rename(uv_loop_t* loop, uv_fs_t* req, const char* path, const char* new_path, uv_fs_cb cb); UV_EXTERN int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb); UV_EXTERN int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb); UV_EXTERN int uv_fs_ftruncate(uv_loop_t* loop, uv_fs_t* req, uv_file file, off_t offset, uv_fs_cb cb); UV_EXTERN int uv_fs_sendfile(uv_loop_t* loop, uv_fs_t* req, uv_file out_fd, uv_file in_fd, off_t in_offset, size_t length, uv_fs_cb cb); UV_EXTERN int uv_fs_chmod(uv_loop_t* loop, uv_fs_t* req, const char* path, int mode, uv_fs_cb cb); UV_EXTERN int uv_fs_utime(uv_loop_t* loop, uv_fs_t* req, const char* path, double atime, double mtime, uv_fs_cb cb); UV_EXTERN int uv_fs_futime(uv_loop_t* loop, uv_fs_t* req, uv_file file, double atime, double mtime, uv_fs_cb cb); UV_EXTERN int uv_fs_lstat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb); UV_EXTERN int uv_fs_link(uv_loop_t* loop, uv_fs_t* req, const char* path, const char* new_path, uv_fs_cb cb); /* * This flag can be used with uv_fs_symlink on Windows * to specify whether path argument points to a directory. */ #define UV_FS_SYMLINK_DIR 0x0001 UV_EXTERN int uv_fs_symlink(uv_loop_t* loop, uv_fs_t* req, const char* path, const char* new_path, int flags, uv_fs_cb cb); UV_EXTERN int uv_fs_readlink(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb); UV_EXTERN int uv_fs_fchmod(uv_loop_t* loop, uv_fs_t* req, uv_file file, int mode, uv_fs_cb cb); UV_EXTERN int uv_fs_chown(uv_loop_t* loop, uv_fs_t* req, const char* path, int uid, int gid, uv_fs_cb cb); UV_EXTERN int uv_fs_fchown(uv_loop_t* loop, uv_fs_t* req, uv_file file, int uid, int gid, uv_fs_cb cb); enum uv_fs_event { UV_RENAME = 1, UV_CHANGE = 2 }; struct uv_fs_event_s { UV_HANDLE_FIELDS char* filename; UV_FS_EVENT_PRIVATE_FIELDS }; /* * Gets load avg * See: http://en.wikipedia.org/wiki/Load_(computing) * (Returns [0,0,0] for windows and cygwin) */ UV_EXTERN void uv_loadavg(double avg[3]); /* * Flags to be passed to uv_fs_event_init. */ enum uv_fs_event_flags { /* * By default, if the fs event watcher is given a directory name, we will * watch for all events in that directory. This flags overrides this behavior * and makes fs_event report only changes to the directory entry itself. This * flag does not affect individual files watched. * This flag is currently not implemented yet on any backend. */ UV_FS_EVENT_WATCH_ENTRY = 1, /* * By default uv_fs_event will try to use a kernel interface such as inotify * or kqueue to detect events. This may not work on remote filesystems such * as NFS mounts. This flag makes fs_event fall back to calling stat() on a * regular interval. * This flag is currently not implemented yet on any backend. */ UV_FS_EVENT_STAT = 2 }; UV_EXTERN int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle, const char* filename, uv_fs_event_cb cb, int flags); /* Utility */ /* Convert string ip addresses to binary structures */ UV_EXTERN struct sockaddr_in uv_ip4_addr(const char* ip, int port); UV_EXTERN struct sockaddr_in6 uv_ip6_addr(const char* ip, int port); /* Convert binary addresses to strings */ UV_EXTERN int uv_ip4_name(struct sockaddr_in* src, char* dst, size_t size); UV_EXTERN int uv_ip6_name(struct sockaddr_in6* src, char* dst, size_t size); /* Gets the executable path */ UV_EXTERN int uv_exepath(char* buffer, size_t* size); /* Gets memory info in bytes */ UV_EXTERN uint64_t uv_get_free_memory(void); UV_EXTERN uint64_t uv_get_total_memory(void); /* * Returns the current high-resolution real time. This is expressed in * nanoseconds. It is relative to an arbitrary time in the past. It is not * related to the time of day and therefore not subject to clock drift. The * primary use is for measuring performance between intervals. * * Note not every platform can support nanosecond resolution; however, this * value will always be in nanoseconds. */ UV_EXTERN extern uint64_t uv_hrtime(void); /* * Opens a shared library. The filename is in utf-8. On success, -1 is * and the variable pointed by library receives a handle to the library. */ UV_EXTERN uv_err_t uv_dlopen(const char* filename, uv_lib_t* library); UV_EXTERN uv_err_t uv_dlclose(uv_lib_t library); /* * Retrieves a data pointer from a dynamic library. */ UV_EXTERN uv_err_t uv_dlsym(uv_lib_t library, const char* name, void** ptr); /* the presence of these unions force similar struct layout */ union uv_any_handle { uv_tcp_t tcp; uv_pipe_t pipe; uv_prepare_t prepare; uv_check_t check; uv_idle_t idle; uv_async_t async; uv_timer_t timer; uv_getaddrinfo_t getaddrinfo; uv_fs_event_t fs_event; }; union uv_any_req { uv_req_t req; uv_write_t write; uv_connect_t connect; uv_shutdown_t shutdown; uv_fs_t fs_req; uv_work_t work_req; }; struct uv_counters_s { uint64_t eio_init; uint64_t req_init; uint64_t handle_init; uint64_t stream_init; uint64_t tcp_init; uint64_t udp_init; uint64_t pipe_init; uint64_t tty_init; uint64_t prepare_init; uint64_t check_init; uint64_t idle_init; uint64_t async_init; uint64_t timer_init; uint64_t process_init; uint64_t fs_event_init; }; struct uv_loop_s { UV_LOOP_PRIVATE_FIELDS /* list used for ares task handles */ uv_ares_task_t* uv_ares_handles_; /* Various thing for libeio. */ uv_async_t uv_eio_want_poll_notifier; uv_async_t uv_eio_done_poll_notifier; uv_idle_t uv_eio_poller; /* Diagnostic counters */ uv_counters_t counters; /* The last error */ uv_err_t last_err; /* User data - use this for whatever. */ void* data; }; /* Don't export the private CPP symbols. */ #undef UV_REQ_TYPE_PRIVATE #undef UV_REQ_PRIVATE_FIELDS #undef UV_STREAM_PRIVATE_FIELDS #undef UV_TCP_PRIVATE_FIELDS #undef UV_PREPARE_PRIVATE_FIELDS #undef UV_CHECK_PRIVATE_FIELDS #undef UV_IDLE_PRIVATE_FIELDS #undef UV_ASYNC_PRIVATE_FIELDS #undef UV_TIMER_PRIVATE_FIELDS #undef UV_GETADDRINFO_PRIVATE_FIELDS #undef UV_FS_REQ_PRIVATE_FIELDS #undef UV_WORK_PRIVATE_FIELDS #undef UV_FS_EVENT_PRIVATE_FIELDS #ifdef __cplusplus } #endif #endif /* UV_H */