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* Return early when opening the device failed and just return B_ERROR as

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documented in the BeBook. Sadly the success return is specified as "a positive
  integer", so I didn't change it to B_OK.
* We actually want non-blocking mode, so don't reset the O_NONBLOCK flag. It was
  ignored before anyway though, so this doesn't change anything.
* The legacy buttons 1 and 2 are in the pressed state when false, so initialize
  them to true instead.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41876 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2011-06-03 12:15:46 +00:00
parent 30e429b4e4
commit 2682d2fbdd
1 changed files with 31 additions and 43 deletions
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22
src/kits/device/Joystick.cpp
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@ -4,16 +4,11 @@
* Distributed under the terms of the MIT License.
*/
#include <Joystick.h>
#include <JoystickTweaker.h>
#include <new>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <Debug.h>
@ -53,8 +48,8 @@ BJoystick::BJoystick()
timestamp(0),
horizontal(0),
vertical(0),
button1(0),
button2(0),
button1(true),
button2(true),
fBeBoxMode(false),
fFD(-1),
@ -129,15 +124,10 @@ BJoystick::Open(const char *portName, bool enhanced)
// TODO: BeOS don't use O_EXCL, and this seems to lead to some issues. I
// added this flag having read some comments by Marco Nelissen on the
// annotated BeBook. I think BeOS uses O_RDWR|O_NONBLOCK here.
// annotated BeBook. I think BeOS uses O_RDWR | O_NONBLOCK here.
fFD = open(nameBuffer, O_RDWR | O_NONBLOCK | O_EXCL);
if (fFD >= 0) {
// we used open() with O_NONBLOCK flag to let it return immediately,
// but we want read/write operations to block if needed, so we clear
// that bit here.
int flags = fcntl(fFD, F_GETFL);
fcntl(fFD, F_SETFL, flags & ~O_NONBLOCK);
if (fFD < 0)
return B_ERROR;
// read the Joystick Description file for this port/joystick
_BJoystickTweaker joystickTweaker(*this);
@ -170,8 +160,6 @@ BJoystick::Open(const char *portName, bool enhanced)
}
return fFD;
} else
return errno;
}