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Small cleanup, added a comment to some obscure code

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9898 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini
2004-11-10 12:43:06 +00:00
parent 9bcc882ae1
commit bdd5913945
1 changed files with 6 additions and 5 deletions
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src/kits/device/SerialPort.cpp
+6 -5
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@@ -22,8 +22,7 @@
#define SERIAL_DIR "/dev/ports" #define SERIAL_DIR "/dev/ports"
// Scans a directory and adds the entries it founds as strings to the // Scans a directory and adds the entries it founds as strings to the
// given list. TODO: It should be moved to another place, since it could be // given list
// used by BJoystick too.
static int32 static int32
scan_directory(const char *directory, BList *list) scan_directory(const char *directory, BList *list)
{ {
@@ -115,9 +114,11 @@ BSerialPort::Open(const char *portName)
ffd = open(buf, O_RDWR | O_NONBLOCK | O_EXCL); ffd = open(buf, O_RDWR | O_NONBLOCK | O_EXCL);
if (ffd >= 0) { if (ffd >= 0) {
//Setup the port // we used open() with O_NONBLOCK flag to let it return immediately,
int ret = fcntl(ffd, F_GETFL); // but we want read/write operations to block if needed,
fcntl(ffd, F_SETFL, ret & 0x7F); // so we clear that bit here.
int flags = fcntl(ffd, F_GETFL);
fcntl(ffd, F_SETFL, flags & ~O_NONBLOCK);
DriverControl(); DriverControl();
} }