summaryrefslogtreecommitdiff
path: root/ACE/netsvcs/clients/Tokens/collection/rw_locks.cpp
blob: 3a4dc1e613804ec6439063b1347db3f0777d9e40 (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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
#include "ace/Get_Opt.h"
#include "ace/Local_Tokens.h"
#include "ace/Remote_Tokens.h"
#include "ace/Thread_Manager.h"

#if defined (ACE_HAS_THREADS) && defined (ACE_HAS_THREADS_LIBRARY)



static ACE_Token_Proxy *global_rlock;
static ACE_Token_Proxy *global_wlock;

static char *server_host = ACE_DEFAULT_SERVER_HOST;
static int server_port = ACE_DEFAULT_SERVER_PORT;
static int ignore_deadlock = 0;
static int threads = 2;
static int iterations = 50;
static int debug = 0;
static int remote = 0;
static int reads = 4;
static int write_sleep = 0;

static void *
run_thread (void *vp)
{
  for (int x = 0; x < iterations; x++)
    {
      int y = 0;
      for (; y < reads; y++)
        {
          if (global_rlock->acquire () == -1)
          {
            if (ACE_Log_Msg::instance ()->errnum () == EDEADLK)
              {
                ACE_DEBUG ((LM_DEBUG, "rlock deadlock detected\n"));
                goto READ_DEADLOCK;
              }
            else
              return 0;
          }

          ACE_DEBUG ((LM_DEBUG, "(%t) rlock acquired.\n"));
        }

      READ_DEADLOCK:
        for (; y > 0; y--)
          {
            if (global_rlock->release () == 0)
              ACE_DEBUG ((LM_DEBUG, "(%t) r-released.\n"));
          }

        if (global_wlock->acquire () == -1)
          {
            ACE_DEBUG ((LM_DEBUG, "wlock deadlock detected\n"));
          }
        else
          {
            if (write_sleep)
              ACE_OS::sleep (1);
            ACE_DEBUG ((LM_DEBUG, "\t\t(%t) wlock acquired.\n"));
            if (global_wlock->release () == 0)
              ACE_DEBUG ((LM_DEBUG, "\t\t(%t) w-released.\n"));
          }
    }

  ACE_DEBUG ((LM_DEBUG, "(%t) thread exiting.\n"));
  return 0;
}

static int
parse_args (int argc, ACE_TCHAR *argv[])
{
  ACE_LOG_MSG->open (argv[0], ACE_Log_Msg::STDERR); // | ACE_Log_Msg::VERBOSE);

  ACE_Get_Opt get_opt (argc, argv, ACE_TEXT("t:iun:drR:sp:h:"), 1);

  for (int c; (c = get_opt ()) != -1; )
    {
      switch (c)
        {
        case 'h':  // specify the host machine on which the server is running
          server_host = get_opt.opt_arg ();
          break;
        case 'p':  // specify the port on which the server is running
          server_port = ACE_OS::atoi (get_opt.opt_arg ());
          break;
        case 't':
          threads = ACE_OS::atoi (get_opt.opt_arg ());
          break;
        case 'R':
          reads = ACE_OS::atoi (get_opt.opt_arg ());
          break;
        case 'd':
          debug = 1;
          break;
        case 'r':
          remote = 1;
          break;
        case 's':
          write_sleep = 1;
          break;
        case 'n':
          iterations = ACE_OS::atoi (get_opt.opt_arg ());
          break;
        case 'i':
          ignore_deadlock = 1;
          break;
        case 'u':
          // usage same as unknown.
          ACE_FALLTHROUGH;
        default:
          ACE_ERROR_RETURN ((LM_ERROR,
                             "%n:\n"
                             "[-i ignore deadlock]\n"
                             "[-n <iterations>]\n"
                             "[-R <reads>]\n"
                             "[-r use remote locks]\n"
                             "[-d debug]\n"
                             "[-s sleep during writes]\n"
                             "[-t <threads>\n", 1), -1);
          break;
        }
    }

  return 0;
}

int
ACE_TMAIN(int argc, ACE_TCHAR *argv[])
{
  if (parse_args (argc, argv) == -1)
    return -1;

  if (remote)
    {
      ACE_Remote_Mutex::set_server_address (ACE_INET_Addr (server_port, server_host));
      global_rlock = (ACE_Token_Proxy *) new
                        ACE_Remote_RLock ("THE_TOKEN", ignore_deadlock, debug);
      global_wlock = (ACE_Token_Proxy *) new
                        ACE_Remote_WLock ("THE_TOKEN", ignore_deadlock, debug);
    }
  else
    {
      global_rlock = (ACE_Token_Proxy *) new
                        ACE_Local_RLock ("THE_TOKEN", ignore_deadlock, debug);
      global_wlock = (ACE_Token_Proxy *) new
                        ACE_Local_WLock ("THE_TOKEN", ignore_deadlock, debug);
    }

  ACE_Thread_Manager mgr;

  if (mgr.spawn_n (threads, ACE_THR_FUNC (run_thread),
                   (void *) 0,
                    THR_BOUND | THR_SUSPENDED) == -1)
                    ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "spawn failed"), -1);

  if (mgr.resume_all () == -1)
    ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "resume failed"), -1);

  mgr.wait ();

  return 0;
}

#else
int
ACE_TMAIN(int, ACE_TCHAR *[])
{
  ACE_ERROR_RETURN ((LM_ERROR,
                     "threads not supported on this platform\n"), -1);
}
#endif /* ACE_HAS_THREADS */