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| author | Patrik Nyblom <[email protected]> | 2012-11-12 15:18:55 +0100 |
|---|---|---|
| committer | Patrik Nyblom <[email protected]> | 2012-11-16 09:36:22 +0100 |
| commit | 4e0cca34aaf815f7320370ee42ddbd0d772fd806 (patch) | |
| tree | 1a90166c9cd1a238d7684a99b9f6521a63970fda | |
| parent | 15f3cb7cb7074d507f70e778862e285e844b8546 (diff) | |
| download | otp-4e0cca34aaf815f7320370ee42ddbd0d772fd806.tar.gz otp-4e0cca34aaf815f7320370ee42ddbd0d772fd806.tar.bz2 otp-4e0cca34aaf815f7320370ee42ddbd0d772fd806.zip | |
Bring driver tutorial up to date.
| -rw-r--r-- | system/doc/tutorial/port_driver.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/system/doc/tutorial/port_driver.c b/system/doc/tutorial/port_driver.c index d428d08ff3..37de67310f 100644 --- a/system/doc/tutorial/port_driver.c +++ b/system/doc/tutorial/port_driver.c @@ -19,7 +19,8 @@ static void example_drv_stop(ErlDrvData handle) driver_free((char*)handle); } -static void example_drv_output(ErlDrvData handle, char *buff, int bufflen) +static void example_drv_output(ErlDrvData handle, char *buff, + ErlDrvSizeT bufflen) { example_data* d = (example_data*)handle; char fn = buff[0], arg = buff[1], res; @@ -32,7 +33,7 @@ static void example_drv_output(ErlDrvData handle, char *buff, int bufflen) } ErlDrvEntry example_driver_entry = { - NULL, /* F_PTR init, N/A */ + NULL, /* F_PTR init, called when driver is loaded */ example_drv_start, /* L_PTR start, called when port is opened */ example_drv_stop, /* F_PTR stop, called when port is closed */ example_drv_output, /* F_PTR output, called when erlang has sent */ @@ -40,9 +41,30 @@ ErlDrvEntry example_driver_entry = { NULL, /* F_PTR ready_output, called when output descriptor ready */ "example_drv", /* char *driver_name, the argument to open_port */ NULL, /* F_PTR finish, called when unloaded */ + NULL, /* void *handle, Reserved by VM */ NULL, /* F_PTR control, port_command callback */ NULL, /* F_PTR timeout, reserved */ - NULL /* F_PTR outputv, reserved */ + NULL, /* F_PTR outputv, reserved */ + NULL, /* F_PTR ready_async, only for async drivers */ + NULL, /* F_PTR flush, called when port is about + to be closed, but there is data in driver + queue */ + NULL, /* F_PTR call, much like control, sync call + to driver */ + NULL, /* F_PTR event, called when an event selected + by driver_event() occurs. */ + ERL_DRV_EXTENDED_MARKER, /* int extended marker, Should always be + set to indicate driver versioning */ + ERL_DRV_EXTENDED_MAJOR_VERSION, /* int major_version, should always be + set to this value */ + ERL_DRV_EXTENDED_MINOR_VERSION, /* int minor_version, should always be + set to this value */ + 0, /* int driver_flags, see documentation */ + NULL, /* void *handle2, reserved for VM use */ + NULL, /* F_PTR process_exit, called when a + monitored process dies */ + NULL /* F_PTR stop_select, called to close an + event object */ }; DRIVER_INIT(example_drv) /* must match name in driver_entry */ |