diff options
Diffstat (limited to 'erts/doc/src/driver_entry.xml')
| -rw-r--r-- | erts/doc/src/driver_entry.xml | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/erts/doc/src/driver_entry.xml b/erts/doc/src/driver_entry.xml index bad20d6343..ae7f264d0c 100644 --- a/erts/doc/src/driver_entry.xml +++ b/erts/doc/src/driver_entry.xml @@ -247,14 +247,10 @@ typedef struct erl_drv_entry { something that the <c>WaitForMultipleObjects</c> API function understands). (Some trickery in the emulator allows more than the built-in limit of 64 <c>Events</c> to be used.)</p> - <p>On Enea OSE the <c>event</c> is one or more signals that can - be retrieved using <seealso marker="ose:ose_erl_driver#erl_drv_ose_get_signal">erl_drv_ose_get_signal</seealso>.</p> <p>To use this with threads and asynchronous routines, create a - pipe on unix, an Event on Windows or a unique signal number on - Enea OSE. When the routine + pipe on unix and an Event on Windows. When the routine completes, write to the pipe (use <c>SetEvent</c> on - Windows or send a message to the emulator process on Enea OSE), - this will make the emulator call + Windows), this will make the emulator call <c>ready_input</c> or <c>ready_output</c>.</p> <p>Spurious events may happen. That is, calls to <c>ready_input</c> or <c>ready_output</c> even though no real events are signaled. In @@ -441,7 +437,14 @@ typedef struct erl_drv_entry { <seealso marker="erl_driver#erl_drv_busy_msgq_limits">erl_drv_busy_msgq_limits()</seealso> function. </item> - </taglist> + <tag><c>ERL_DRV_FLAG_USE_INIT_ACK</c></tag> + <item>When this flag is given the linked-in driver has to manually + acknowledge that the port has been successfully started using + <seealso marker="erl_driver#erl_drv_init_ack">erl_drv_init_ack()</seealso>. + This allows the implementor to make the erlang:open_port exit with + badarg after some initial asynchronous initialization has been done. + </item> + </taglist> </item> <tag>void *handle2</tag> <item> |