deps: update libuv to version 1.7.4

PR-URL: #2817
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: saghul

Diff for: deps/uv/AUTHORS

@@ -219,3 +219,8 @@ Zachary Hamm <zsh@imipolexg.org>
 Karl Skomski <karl@skomski.com>
 Jeremy Whitlock <jwhitlock@apache.org>
 Willem Thiart <himself@willemthiart.com>
+Ben Trask <bentrask@comcast.net>
+Jianghua Yang <jianghua.yjh@alibaba-inc.com>
+Colin Snover <github.com@zetafleet.com>
+Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
+Eli Skeggs <skeggse@gmail.com>

Diff for: deps/uv/CONTRIBUTING.md

@@ -49,7 +49,7 @@ the [Google C/C++ style guide]. Some of the key points, as well as some
 additional guidelines, are enumerated below.
 
 * Code that is specific to unix-y platforms should be placed in `src/unix`, and
-  declarations go into `src/uv-unix.h`.
+  declarations go into `include/uv-unix.h`.
 
 * Source code that is Windows-specific goes into `src/win`, and related
   publicly exported types, functions and macro declarations should generally

Diff for: deps/uv/ChangeLog

@@ -1,3 +1,34 @@
+2015.09.12, Version 1.7.4 (Stable), a7ad4f52189d89cfcba35f78bfc5ff3b1f4105c4
+
+Changes since version 1.7.3:
+
+* doc: uv_read_start and uv_read_cb clarifications (Ben Trask)
+
+* freebsd: obtain true uptime through clock_gettime() (Jianghua Yang)
+
+* win, tty: do not convert \r to \r\n (Colin Snover)
+
+* build,gyp: add DragonFly to the list of OSes (Michael Neumann)
+
+* fs: fix bug in sendfile for DragonFly (Michael Neumann)
+
+* doc: add uv_dlsym() return type (Brian White)
+
+* tests: fix fs tests run w/o full getdents support (Jeremy Whitlock)
+
+* doc: fix typo (Devchandra Meetei Leishangthem)
+
+* doc: fix uv-unix.h location (Sakthipriyan Vairamani)
+
+* unix: fix error check when closing process pipe fd (Ben Noordhuis)
+
+* test,freebsd: fix ipc_listen_xx_write tests (Santiago Gimeno)
+
+* win: fix unsavory rwlock fallback implementation (Bert Belder)
+
+* doc: clarify repeat timer behavior (Eli Skeggs)
+
+
 2015.08.28, Version 1.7.3 (Stable), 93877b11c8b86e0a6befcda83a54555c1e36e4f0
 
 Changes since version 1.7.2:

Diff for: deps/uv/appveyor.yml

@@ -1,4 +1,4 @@
-version: v1.7.3.build{build}
+version: v1.7.4.build{build}
 
 install:
   - cinst -y nsis

Diff for: deps/uv/common.gypi

@@ -129,7 +129,7 @@
           }]
         ]
       }],
-      ['OS in "freebsd linux openbsd solaris android"', {
+      ['OS in "freebsd dragonflybsd linux openbsd solaris android"', {
         'cflags': [ '-Wall' ],
         'cflags_cc': [ '-fno-rtti', '-fno-exceptions' ],
         'target_conditions': [

Diff for: deps/uv/configure.ac

@@ -13,7 +13,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_PREREQ(2.57)
-AC_INIT([libuv], [1.7.3], [https://github.com/libuv/libuv/issues])
+AC_INIT([libuv], [1.7.4], [https://github.com/libuv/libuv/issues])
 AC_CONFIG_MACRO_DIR([m4])
 m4_include([m4/libuv-extra-automake-flags.m4])
 m4_include([m4/as_case.m4])

Diff for: deps/uv/docs/src/dll.rst

@@ -34,7 +34,7 @@ API
 
     Close the shared library.
 
-.. c:function:: uv_dlsym(uv_lib_t* lib, const char* name, void** ptr)
+.. c:function:: int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr)
 
     Retrieves a data pointer from a dynamic library. It is legal for a symbol
     to map to NULL. Returns 0 on success and -1 if the symbol was not found.

Diff for: deps/uv/docs/src/request.rst

@@ -25,7 +25,7 @@ Data types
 Public members
 ^^^^^^^^^^^^^^
 
-.. c:member:: void* uv_request_t.data
+.. c:member:: void* uv_req_t.data
 
     Space for user-defined arbitrary data. libuv does not use this field.
 

Diff for: deps/uv/docs/src/stream.rst

@@ -32,8 +32,14 @@ Data types
 
     Callback called when data was read on a stream.
 
-    `nread` is > 0 if there is data available, 0 if libuv is done reading for
-    now, or < 0 on error.
+    `nread` is > 0 if there is data available or < 0 on error. When we've
+    reached EOF, `nread` will be set to ``UV_EOF``. When `nread` < 0,
+    the `buf` parameter might not point to a valid buffer; in that case
+    `buf.len` and `buf.base` are both set to 0.
+
+    .. note::
+        `nread` might be 0, which does *not* indicate an error or EOF. This
+        is equivalent to ``EAGAIN`` or ``EWOULDBLOCK`` under ``read(2)``.
 
     The callee is responsible for stopping closing the stream when an error happens
     by calling :c:func:`uv_read_stop` or :c:func:`uv_close`. Trying to read
@@ -125,17 +131,9 @@ API
 
 .. c:function:: int uv_read_start(uv_stream_t* stream, uv_alloc_cb alloc_cb, uv_read_cb read_cb)
 
-    Read data from an incoming stream. The callback will be made several
-    times until there is no more data to read or :c:func:`uv_read_stop` is called.
-    When we've reached EOF `nread` will be set to ``UV_EOF``.
-
-    When `nread` < 0, the `buf` parameter might not point to a valid buffer;
-    in that case `buf.len` and `buf.base` are both set to 0.
-
-    .. note::
-        `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.
+    Read data from an incoming stream. The :c:type:`uv_read_cb` callback will
+    be made several times until there is no more data to read or
+    :c:func:`uv_read_stop` is called.
 
 .. c:function:: int uv_read_stop(uv_stream_t*)
 

Diff for: deps/uv/docs/src/timer.rst

@@ -54,7 +54,15 @@ API
 
 .. c:function:: void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat)
 
-    Set the repeat value in milliseconds.
+    Set the repeat interval value in milliseconds. The timer will be scheduled
+    to run on the given interval, regardless of the callback execution
+    duration, and will follow normal timer semantics in the case of a
+    time-slice overrun.
+
+    For example, if a 50ms repeating timer first runs for 17ms, it will be
+    scheduled to run again 33ms later. If other tasks consume more than the
+    33ms following the first timer callback, then the callback will run as soon
+    as possible.
 
     .. note::
         If the repeat value is set from a timer callback it does not immediately take effect.

Diff for: deps/uv/include/uv-version.h

@@ -32,7 +32,7 @@
 
 #define UV_VERSION_MAJOR 1
 #define UV_VERSION_MINOR 7
-#define UV_VERSION_PATCH 3
+#define UV_VERSION_PATCH 4
 #define UV_VERSION_IS_RELEASE 1
 #define UV_VERSION_SUFFIX ""
 

Diff for: deps/uv/include/uv-win.h

@@ -250,8 +250,16 @@ typedef union {
   /* windows.h. */
   SRWLOCK srwlock_;
   struct {
-    uv_mutex_t read_mutex_;
-    uv_mutex_t write_mutex_;
+    union {
+      CRITICAL_SECTION cs;
+      /* TODO: remove me in v2.x. */
+      uv_mutex_t unused;
+    } read_lock_;
+    union {
+      HANDLE sem;
+      /* TODO: remove me in v2.x. */
+      uv_mutex_t unused;
+    } write_lock_;
     unsigned int num_readers_;
   } fallback_;
 } uv_rwlock_t;

Diff for: deps/uv/src/unix/freebsd.c

@@ -240,17 +240,13 @@ int uv_resident_set_memory(size_t* rss) {
 
 
 int uv_uptime(double* uptime) {
-  time_t now;
-  struct timeval info;
-  size_t size = sizeof(info);
-  static int which[] = {CTL_KERN, KERN_BOOTTIME};
-
-  if (sysctl(which, 2, &info, &size, NULL, 0))
+  int r;
+  struct timespec sp;
+  r = clock_gettime(CLOCK_MONOTONIC, &sp);
+  if (r)
     return -errno;
 
-  now = time(NULL);
-
-  *uptime = (double)(now - info.tv_sec);
+  *uptime = sp.tv_sec;
   return 0;
 }
 

Diff for: deps/uv/src/unix/fs.c

@@ -574,7 +574,14 @@ static ssize_t uv__fs_sendfile(uv_fs_t* req) {
     r = sendfile(in_fd, out_fd, req->off, &len, NULL, 0);
 #endif
 
-    if (r != -1 || len != 0) {
+     /*
+     * The man page for sendfile(2) on DragonFly states that `len` contains
+     * a meaningful value ONLY in case of EAGAIN and EINTR.
+     * Nothing is said about it's value in case of other errors, so better
+     * not depend on the potential wrong assumption that is was not modified
+     * by the syscall.
+     */
+    if (r == 0 || ((errno == EAGAIN || errno == EINTR) && len != 0)) {
       req->off += len;
       return (ssize_t) len;
     }

Diff for: deps/uv/src/unix/process.c

@@ -226,13 +226,14 @@ static int uv__process_open_stream(uv_stdio_container_t* container,
                                    int pipefds[2],
                                    int writable) {
   int flags;
+  int err;
 
   if (!(container->flags & UV_CREATE_PIPE) || pipefds[0] < 0)
     return 0;
 
-  if (uv__close(pipefds[1]))
-    if (errno != EINTR && errno != EINPROGRESS)
-      abort();
+  err = uv__close(pipefds[1]);
+  if (err != 0 && err != -EINPROGRESS)
+    abort();
 
   pipefds[1] = -1;
   uv__nonblock(pipefds[0], 1);

Diff for: deps/uv/src/win/thread.c

@@ -396,83 +396,105 @@ static void uv__rwlock_srwlock_wrunlock(uv_rwlock_t* rwlock) {
 
 
 static int uv__rwlock_fallback_init(uv_rwlock_t* rwlock) {
-  int err;
-
-  err = uv_mutex_init(&rwlock->fallback_.read_mutex_);
-  if (err)
-    return err;
+  /* Initialize the semaphore that acts as the write lock. */
+  HANDLE handle = CreateSemaphoreW(NULL, 1, 1, NULL);
+  if (handle == NULL)
+    return uv_translate_sys_error(GetLastError());
+  rwlock->fallback_.write_lock_.sem = handle;
 
-  err = uv_mutex_init(&rwlock->fallback_.write_mutex_);
-  if (err) {
-    uv_mutex_destroy(&rwlock->fallback_.read_mutex_);
-    return err;
-  }
+  /* Initialize the critical section protecting the reader count. */
+  InitializeCriticalSection(&rwlock->fallback_.read_lock_.cs);
 
+  /* Initialize the reader count. */
   rwlock->fallback_.num_readers_ = 0;
 
   return 0;
 }
 
 
 static void uv__rwlock_fallback_destroy(uv_rwlock_t* rwlock) {
-  uv_mutex_destroy(&rwlock->fallback_.read_mutex_);
-  uv_mutex_destroy(&rwlock->fallback_.write_mutex_);
+  DeleteCriticalSection(&rwlock->fallback_.read_lock_.cs);
+  CloseHandle(rwlock->fallback_.write_lock_.sem);
 }
 
 
 static void uv__rwlock_fallback_rdlock(uv_rwlock_t* rwlock) {
-  uv_mutex_lock(&rwlock->fallback_.read_mutex_);
-
-  if (++rwlock->fallback_.num_readers_ == 1)
-    uv_mutex_lock(&rwlock->fallback_.write_mutex_);
+  /* Acquire the lock that protects the reader count. */
+  EnterCriticalSection(&rwlock->fallback_.read_lock_.cs);
+
+  /* Increase the reader count, and lock for write if this is the first
+   * reader.
+   */
+  if (++rwlock->fallback_.num_readers_ == 1) {
+    DWORD r = WaitForSingleObject(rwlock->fallback_.write_lock_.sem, INFINITE);
+    if (r != WAIT_OBJECT_0)
+      uv_fatal_error(GetLastError(), "WaitForSingleObject");
+  }
 
-  uv_mutex_unlock(&rwlock->fallback_.read_mutex_);
+  /* Release the lock that protects the reader count. */
+  LeaveCriticalSection(&rwlock->fallback_.read_lock_.cs);
 }
 
 
 static int uv__rwlock_fallback_tryrdlock(uv_rwlock_t* rwlock) {
   int err;
 
-  err = uv_mutex_trylock(&rwlock->fallback_.read_mutex_);
-  if (err)
-    goto out;
+  if (!TryEnterCriticalSection(&rwlock->fallback_.read_lock_.cs))
+    return UV_EAGAIN;
 
   err = 0;
-  if (rwlock->fallback_.num_readers_ == 0)
-    err = uv_mutex_trylock(&rwlock->fallback_.write_mutex_);
-
-  if (err == 0)
-    rwlock->fallback_.num_readers_++;
-
-  uv_mutex_unlock(&rwlock->fallback_.read_mutex_);
+  if (rwlock->fallback_.num_readers_ == 0) {
+    DWORD r = WaitForSingleObject(rwlock->fallback_.write_lock_.sem, 0);
+    if (r == WAIT_OBJECT_0)
+      rwlock->fallback_.num_readers_++;
+    else if (r == WAIT_TIMEOUT)
+      err = UV_EAGAIN;
+    else if (r == WAIT_FAILED)
+      err = uv_translate_sys_error(GetLastError());
+    else
+      err = UV_EIO;
+  }
 
-out:
+  LeaveCriticalSection(&rwlock->fallback_.read_lock_.cs);
   return err;
 }
 
 
 static void uv__rwlock_fallback_rdunlock(uv_rwlock_t* rwlock) {
-  uv_mutex_lock(&rwlock->fallback_.read_mutex_);
+  EnterCriticalSection(&rwlock->fallback_.read_lock_.cs);
 
-  if (--rwlock->fallback_.num_readers_ == 0)
-    uv_mutex_unlock(&rwlock->fallback_.write_mutex_);
+  if (--rwlock->fallback_.num_readers_ == 0) {
+    if (!ReleaseSemaphore(rwlock->fallback_.write_lock_.sem, 1, NULL))
+      uv_fatal_error(GetLastError(), "ReleaseSemaphore");
+  }
 
-  uv_mutex_unlock(&rwlock->fallback_.read_mutex_);
+  LeaveCriticalSection(&rwlock->fallback_.read_lock_.cs);
 }
 
 
 static void uv__rwlock_fallback_wrlock(uv_rwlock_t* rwlock) {
-  uv_mutex_lock(&rwlock->fallback_.write_mutex_);
+  DWORD r = WaitForSingleObject(rwlock->fallback_.write_lock_.sem, INFINITE);
+  if (r != WAIT_OBJECT_0)
+    uv_fatal_error(GetLastError(), "WaitForSingleObject");
 }
 
 
 static int uv__rwlock_fallback_trywrlock(uv_rwlock_t* rwlock) {
-  return uv_mutex_trylock(&rwlock->fallback_.write_mutex_);
+  DWORD r = WaitForSingleObject(rwlock->fallback_.write_lock_.sem, 0);
+  if (r == WAIT_OBJECT_0)
+    return 0;
+  else if (r == WAIT_TIMEOUT)
+    return UV_EAGAIN;
+  else if (r == WAIT_FAILED)
+    return uv_translate_sys_error(GetLastError());
+  else
+    return UV_EIO;
 }
 
 
 static void uv__rwlock_fallback_wrunlock(uv_rwlock_t* rwlock) {
-  uv_mutex_unlock(&rwlock->fallback_.write_mutex_);
+  if (!ReleaseSemaphore(rwlock->fallback_.write_lock_.sem, 1, NULL))
+    uv_fatal_error(GetLastError(), "ReleaseSemaphore");
 }