blob: ac2900e29c4bbecf471a711390c8408b53e100cd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
#include "semaphore.h"
namespace AdHoc {
Semaphore::Semaphore(unsigned int initial) : count(initial)
{
}
void
Semaphore::notify()
{
boost::mutex::scoped_lock lock(mutex);
++count;
condition.notify_one();
}
void
Semaphore::wait()
{
boost::mutex::scoped_lock lock(mutex);
while (!count) {
condition.wait(lock);
}
--count;
}
bool
Semaphore::wait(unsigned int timeout)
{
const boost::system_time expiry = boost::get_system_time() + boost::posix_time::milliseconds(timeout);
boost::mutex::scoped_lock lock(mutex);
while (!count) {
if (!condition.timed_wait(lock, expiry)) {
return false;
}
}
--count;
return true;
}
unsigned int
Semaphore::freeCount() const
{
return count;
}
}
|
