installed pty

[VSoRC/.git] / node_modules / node-pty / deps / winpty / src / unix-adapter / WakeupFd.cc

diff --git a/node_modules/node-pty/deps/winpty/src/unix-adapter/WakeupFd.cc b/node_modules/node-pty/deps/winpty/src/unix-adapter/WakeupFd.cc
new file mode 100644 (file)
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--- /dev/null
+++ b/node_modules/node-pty/deps/winpty/src/unix-adapter/WakeupFd.cc
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+// Copyright (c) 2011-2015 Ryan Prichard
+//
+// 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.
+
+#include "WakeupFd.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static void setFdNonBlock(int fd) {
+    int status = fcntl(fd, F_GETFL);
+    fcntl(fd, F_SETFL, status | O_NONBLOCK);
+}
+
+WakeupFd::WakeupFd() {
+    int pipeFd[2];
+    if (pipe(pipeFd) != 0) {
+        perror("Could not create internal wakeup pipe");
+        abort();
+    }
+    m_pipeReadFd = pipeFd[0];
+    m_pipeWriteFd = pipeFd[1];
+    setFdNonBlock(m_pipeReadFd);
+    setFdNonBlock(m_pipeWriteFd);
+}
+
+WakeupFd::~WakeupFd() {
+    close(m_pipeReadFd);
+    close(m_pipeWriteFd);
+}
+
+void WakeupFd::set() {
+    char dummy = 0;
+    int ret;
+    do {
+        ret = write(m_pipeWriteFd, &dummy, 1);
+    } while (ret < 0 && errno == EINTR);
+}
+
+void WakeupFd::reset() {
+    char tmpBuf[256];
+    while (true) {
+        int amount = read(m_pipeReadFd, tmpBuf, sizeof(tmpBuf));
+        if (amount < 0 && errno == EAGAIN) {
+            break;
+        } else if (amount <= 0) {
+            perror("error reading from internal wakeup pipe");
+            abort();
+        }
+    }
+}