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
|
#include "stdafx.h"
#include "ReadWrite.h"
ReadWrite::ReadWrite() : writers(1) {}
ReadWrite::~ReadWrite() {
//Lock as writer to ensure everyone has leaved the session?
}
//Reader
ReadWrite::Reader::Reader(const ReadWrite &rw) : rw(rw) {
util::Lock::L l(rw.readersLock);
if (rw.readers++ == 0) {
//First reader. Wait for writers
rw.writers.down();
}
}
ReadWrite::Reader::~Reader() {
util::Lock::L l(rw.readersLock);
if (--rw.readers == 0) {
//Last reader. Allow writers.
rw.writers.up();
}
}
//Writer
ReadWrite::Writer::Writer(ReadWrite &rw) : rw(rw) {
rw.writers.down();
}
ReadWrite::Writer::~Writer() {
rw.writers.up();
}
|
