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Diffstat (limited to 'doc')
| -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. | |||
| 336 | 336 | ||
| 337 | <h2 id="util">Utility Functions</h2> | 337 | <h2 id="util">Utility Functions</h2> |
| 338 | 338 | ||
| 339 | <h3 id="ffi_errno"><tt>err = ffi.errno()</tt></h3> | 339 | <h3 id="ffi_errno"><tt>err = ffi.errno([newerr])</tt></h3> |
| 340 | <p> | 340 | <p> |
| 341 | Returns the error number set by the last C function call which | 341 | Returns the error number set by the last C function call which |
| 342 | indicated an error condition. | 342 | indicated an error condition. If the optional <tt>newerr</tt> argument |
| 343 | is present, the error number is set to the new value and the previous | ||
| 344 | value is returned. | ||
| 343 | </p> | 345 | </p> |
| 344 | <p> | 346 | <p> |
| 345 | This function offers a portable and OS-independent way to get the error | 347 | This function offers a portable and OS-independent way to get and set the |
| 346 | number. Note that only <em>some</em> C functions set the error | 348 | error number. Note that only <em>some</em> C functions set the error |
| 347 | number. And it's only significant if the function actually indicated an | 349 | number. And it's only significant if the function actually indicated an |
| 348 | error condition (e.g. with a return value of <tt>-1</tt> or | 350 | error condition (e.g. with a return value of <tt>-1</tt> or |
| 349 | <tt>NULL</tt>). Otherwise, it may or may not contain any previously set | 351 | <tt>NULL</tt>). Otherwise, it may or may not contain any previously set |