Handle EINTR in socket functions and continue incomplete sends.

Based on a patch by Ben Noordhuis <info@bnoordhuis.nl>.

BUG=v8:2098
TEST=

Review URL: https://chromiumcodereview.appspot.com/10416006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11609 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/platform-posix.cc

@@ -421,7 +421,11 @@ Socket* POSIXSocket::Accept() const {
     return NULL;
   }
 
-  int socket = accept(socket_, NULL, NULL);
+  int socket;
+  do {
+    socket = accept(socket_, NULL, NULL);
+  } while (socket == -1 && errno == EINTR);
+
   if (socket == -1) {
     return NULL;
   } else {
@@ -448,7 +452,9 @@ bool POSIXSocket::Connect(const char* host, const char* port) {
   }
 
   // Connect.
-  status = connect(socket_, result->ai_addr, result->ai_addrlen);
+  do {
+    status = connect(socket_, result->ai_addr, result->ai_addrlen);
+  } while (status == -1 && errno == EINTR);
   freeaddrinfo(result);
   return status == 0;
 }
@@ -468,14 +474,27 @@ bool POSIXSocket::Shutdown() {
 
 int POSIXSocket::Send(const char* data, int len) const {
   if (len <= 0) return 0;
-  int status = send(socket_, data, len, 0);
-  return (status < 0) ? 0 : status;
+  int written = 0;
+  while (written < len) {
+    int status = send(socket_, data + written, len - written, 0);
+    if (status == 0) {
+      break;
+    } else if (status > 0) {
+      written += status;
+    } else if (errno != EINTR) {
+      return 0;
+    }
+  }
+  return written;
 }
 
 
 int POSIXSocket::Receive(char* data, int len) const {
   if (len <= 0) return 0;
-  int status = recv(socket_, data, len, 0);
+  int status;
+  do {
+    status = recv(socket_, data, len, 0);
+  } while (status == -1 && errno == EINTR);
   return (status < 0) ? 0 : status;
 }
 

src/platform-win32.cc

@@ -1849,8 +1849,18 @@ bool Win32Socket::Shutdown() {
 
 int Win32Socket::Send(const char* data, int len) const {
   if (len <= 0) return 0;
-  int status = send(socket_, data, len, 0);
-  return (status == SOCKET_ERROR) ? 0 : status;
+  int written = 0;
+  while (written < len) {
+    int status = send(socket_, data + written, len - written, 0);
+    if (status == 0) {
+      break;
+    } else if (status > 0) {
+      written += status;
+    } else {
+      return 0;
+    }
+  }
+  return written;
 }