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Member "bonnie++-1.04/semaphore.h" (3 Jul 2009, 1137 Bytes) of package /linux/privat/bonnie++_1.04.tgz:
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1 #ifndef SEMAPHORE_H
2 #define SEMAPHORE_H
3
4 #include <sys/ipc.h>
5 #include <sys/sem.h>
6
7 #ifndef SEMUN_IN_SEM_H
8 union semun
9 {
10 int val; /* value for SETVAL */
11 struct semid_ds *buf; /* buffer for IPC_STAT, IPC_SET */
12 unsigned short int *array; /* array for GETALL, SETALL */
13 struct seminfo *__buf; /* buffer for IPC_INFO */
14 };
15 #endif
16
17 class Semaphore
18 {
19 public:
20
21 // numSems is the number of semaphores to be in the set
22 // semKey is the ID number for the semaphore set
23 // val is the initial value for the semaphores, no values will be assigned
24 // if the default (0) is specified.
25 Semaphore(int semKey, int numSems = 1, int val = 0);
26
27 // clear the semaphores and return an error code.
28 int clear_sem();
29
30 // create the semaphores
31 // count is the initial value assigned to each semaphore
32 int create(int count);
33
34 // get the handle to a semaphore set previously created
35 int get_semid();
36
37 int decrement_and_wait(int nr_sem);
38 int get_mutex();
39 int put_mutex();
40
41 private:
42 union semun m_arg;
43 int m_semid;
44 int m_semflg;
45 bool m_semopen;
46 int m_semKey;
47 int m_numSems;
48 };
49
50 #endif
51