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| author | Mike Pall <mike> | 2011-05-09 11:51:19 +0200 |
|---|---|---|
| committer | Mike Pall <mike> | 2011-05-09 11:52:54 +0200 |
| commit | d9c1f771a7575510a9612e0a67be6c61d83de982 (patch) | |
| tree | 2720ba6f2288adbd9a84c178d10c228803e144bf /doc/ext_ffi_api.html | |
| parent | 868ecad32ba7fb3eb763642e22ebb06938fdb359 (diff) | |
| download | luajit2-d9c1f771a7575510a9612e0a67be6c61d83de982.tar.gz | |
FFI: Allow setting errno with ffi.errno(), too.
Diffstat (limited to 'doc/ext_ffi_api.html')
| -rw-r--r-- | doc/ext_ffi_api.html | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/doc/ext_ffi_api.html b/doc/ext_ffi_api.html index 2d69cb49..e865a5f7 100644 --- a/doc/ext_ffi_api.html +++ b/doc/ext_ffi_api.html @@ -336,14 +336,16 @@ objects. <h2 id="util">Utility Functions</h2> -<h3 id="ffi_errno"><tt>err = ffi.errno()</tt></h3> +<h3 id="ffi_errno"><tt>err = ffi.errno([newerr])</tt></h3> <p> Returns the error number set by the last C function call which -indicated an error condition. +indicated an error condition. If the optional <tt>newerr</tt> argument +is present, the error number is set to the new value and the previous +value is returned. </p> <p> -This function offers a portable and OS-independent way to get the error -number. Note that only <em>some</em> C functions set the error +This function offers a portable and OS-independent way to get and set the +error number. Note that only <em>some</em> C functions set the error number. And it's only significant if the function actually indicated an error condition (e.g. with a return value of <tt>-1</tt> or <tt>NULL</tt>). Otherwise, it may or may not contain any previously set |