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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Copyright (c) 2009 Kungliga Tekniska Hgskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "hi_locl.h"
#ifdef HAVE_GCD
#include <dispatch/dispatch.h>
#else
#include "heim_threads.h"
#endif
struct heim_icred {
uid_t uid;
gid_t gid;
pid_t pid;
pid_t session;
};
void
heim_ipc_free_cred(heim_icred cred)
{
free(cred);
}
uid_t
heim_ipc_cred_get_uid(heim_icred cred)
{
return cred->uid;
}
gid_t
heim_ipc_cred_get_gid(heim_icred cred)
{
return cred->gid;
}
pid_t
heim_ipc_cred_get_pid(heim_icred cred)
{
return cred->pid;
}
pid_t
heim_ipc_cred_get_session(heim_icred cred)
{
return cred->session;
}
int
_heim_ipc_create_cred(uid_t uid, gid_t gid, pid_t pid, pid_t session, heim_icred *cred)
{
*cred = calloc(1, sizeof(**cred));
if (*cred == NULL)
return ENOMEM;
(*cred)->uid = uid;
(*cred)->gid = gid;
(*cred)->pid = pid;
(*cred)->session = session;
return 0;
}
#ifndef HAVE_GCD
struct heim_isemaphore {
HEIMDAL_MUTEX mutex;
pthread_cond_t cond;
long counter;
};
#endif
heim_isemaphore
heim_ipc_semaphore_create(long value)
{
#ifdef HAVE_GCD
return (heim_isemaphore)dispatch_semaphore_create(value);
#elif !defined(ENABLE_PTHREAD_SUPPORT)
heim_assert(0, "no semaphore support w/o pthreads");
return NULL;
#else
heim_isemaphore s = malloc(sizeof(*s));
if (s == NULL)
return NULL;
HEIMDAL_MUTEX_init(&s->mutex);
pthread_cond_init(&s->cond, NULL);
s->counter = value;
return s;
#endif
}
long
heim_ipc_semaphore_wait(heim_isemaphore s, time_t t)
{
#ifdef HAVE_GCD
uint64_t timeout;
if (t == HEIM_IPC_WAIT_FOREVER)
timeout = DISPATCH_TIME_FOREVER;
else
timeout = (uint64_t)t * NSEC_PER_SEC;
return dispatch_semaphore_wait((dispatch_semaphore_t)s, timeout);
#elif !defined(ENABLE_PTHREAD_SUPPORT)
heim_assert(0, "no semaphore support w/o pthreads");
return 0;
#else
HEIMDAL_MUTEX_lock(&s->mutex);
/* if counter hits below zero, we get to wait */
if (--s->counter < 0) {
int ret;
if (t == HEIM_IPC_WAIT_FOREVER)
ret = pthread_cond_wait(&s->cond, &s->mutex);
else {
struct timespec ts;
ts.tv_sec = t;
ts.tv_nsec = 0;
ret = pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
}
if (ret) {
HEIMDAL_MUTEX_unlock(&s->mutex);
return errno;
}
}
HEIMDAL_MUTEX_unlock(&s->mutex);
return 0;
#endif
}
long
heim_ipc_semaphore_signal(heim_isemaphore s)
{
#ifdef HAVE_GCD
return dispatch_semaphore_signal((dispatch_semaphore_t)s);
#elif !defined(ENABLE_PTHREAD_SUPPORT)
heim_assert(0, "no semaphore support w/o pthreads");
return EINVAL;
#else
int wakeup;
HEIMDAL_MUTEX_lock(&s->mutex);
wakeup = (++s->counter == 0) ;
HEIMDAL_MUTEX_unlock(&s->mutex);
if (wakeup)
pthread_cond_signal(&s->cond);
return 0;
#endif
}
void
heim_ipc_semaphore_release(heim_isemaphore s)
{
#ifdef HAVE_GCD
dispatch_release((dispatch_semaphore_t)s);
#elif !defined(ENABLE_PTHREAD_SUPPORT)
heim_assert(0, "no semaphore support w/o pthreads");
#else
HEIMDAL_MUTEX_lock(&s->mutex);
if (s->counter != 0)
abort();
HEIMDAL_MUTEX_unlock(&s->mutex);
HEIMDAL_MUTEX_destroy(&s->mutex);
pthread_cond_destroy(&s->cond);
free(s);
#endif
}
void
heim_ipc_free_data(heim_idata *data)
{
if (data->data)
free(data->data);
data->data = NULL;
data->length = 0;
}
|
