From 195e1f19b06095f39a4fb0da46dfab2ec5b10e9a Mon Sep 17 00:00:00 2001
From: Tuncer Ayaz <tuncer.ayaz@gmail.com>
Date: Thu, 13 Jan 2011 12:36:14 +0100
Subject: Implement file:sendfile

Allow Erlang code to use sendfile() where available by wrapping it as
file:sendfile/4 and file:sendfile/2.

sendfile(2) - Linux man page:
"sendfile() copies data between one file descriptor and another.
Because this copying is done within the kernel, sendfile() is more
efficient than the combination of read(2) and write(2), which would
require transferring data to and from user space."
---
 lib/kernel/doc/src/file.xml | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'lib/kernel/doc/src')

diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index 7db20e6343..78bf0aff45 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -1573,6 +1573,28 @@
           otherwise <c>{error, <anno>Reason</anno>}</c>.</p>
       </desc>
     </func>
+    <func>
+      <name name="sendfile" arity="4"/>
+      <fsummary>send a file to a socket</fsummary>
+      <desc>
+        <p>Sends <c>Bytes</c> in from the file
+        referenced by <c>IoDevice</c> beginning at <c>Offset</c> to
+        <c>Socket</c>.
+        Returns <c>{ok, BytesSent}</c> if successful,
+        otherwise <c>{error, Reason}</c>.</p>
+        <p>Available on Linux, FreeBSD, DragonflyBSD, Solaris, Darwin and Windows</p>
+      </desc>
+    </func>
+    <func>
+      <name name="sendfile" arity="2"/>
+      <fsummary>send a file to a socket</fsummary>
+      <desc>
+        <p>Sends the file <c>Filename</c> to <c>Socket</c>.
+        Returns <c>{ok, BytesSent}</c> if successful,
+        otherwise <c>{error, Reason}</c>.</p>
+        <p>Available on Linux, FreeBSD, DragonflyBSD, Solaris, Darwin and Windows</p>
+      </desc>
+    </func>
     <func>
       <name name="write" arity="2"/>
       <fsummary>Write to a file</fsummary>
-- 
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