2 Copyright (C) 2004-2008 Grame
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2.1 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #include "JackMachSemaphore.h"
21 #include "JackConstants.h"
22 #include "JackTools.h"
23 #include "JackError.h"
29 mach_port_t
JackMachSemaphore::fBootPort
= 0;
31 void JackMachSemaphore::BuildName(const char* client_name
, const char* server_name
, char* res
)
33 char ext_client_name
[JACK_CLIENT_NAME_SIZE
+ 1];
34 JackTools::RewriteName(client_name
, ext_client_name
);
35 sprintf(res
, "jack_mach_sem.%d_%s_%s", JackTools::GetUID(), server_name
, ext_client_name
);
38 bool JackMachSemaphore::Signal()
41 jack_error("JackMachSemaphore::Signal name = %s already desallocated!!", fName
);
49 if ((res
= semaphore_signal(fSemaphore
)) != KERN_SUCCESS
) {
50 jack_error("JackMachSemaphore::Signal name = %s err = %s", fName
, mach_error_string(res
));
52 return (res
== KERN_SUCCESS
);
55 bool JackMachSemaphore::SignalAll()
58 jack_error("JackMachSemaphore::SignalAll name = %s already desallocated!!", fName
);
66 // When signaled several times, do not accumulate signals...
67 if ((res
= semaphore_signal_all(fSemaphore
)) != KERN_SUCCESS
) {
68 jack_error("JackMachSemaphore::SignalAll name = %s err = %s", fName
, mach_error_string(res
));
70 return (res
== KERN_SUCCESS
);
73 bool JackMachSemaphore::Wait()
76 jack_error("JackMachSemaphore::Wait name = %s already desallocated!!", fName
);
81 if ((res
= semaphore_wait(fSemaphore
)) != KERN_SUCCESS
) {
82 jack_error("JackMachSemaphore::Wait name = %s err = %s", fName
, mach_error_string(res
));
84 return (res
== KERN_SUCCESS
);
87 bool JackMachSemaphore::TimedWait(long usec
)
90 jack_error("JackMachSemaphore::TimedWait name = %s already desallocated!!", fName
);
96 time
.tv_sec
= usec
/ 1000000;
97 time
.tv_nsec
= (usec
% 1000000) * 1000;
99 if ((res
= semaphore_timedwait(fSemaphore
, time
)) != KERN_SUCCESS
) {
100 jack_error("JackMachSemaphore::TimedWait name = %s usec = %ld err = %s", fName
, usec
, mach_error_string(res
));
102 return (res
== KERN_SUCCESS
);
105 // Server side : publish the semaphore in the global namespace
106 bool JackMachSemaphore::Allocate(const char* name
, const char* server_name
, int value
)
108 BuildName(name
, server_name
, fName
);
109 mach_port_t task
= mach_task_self();
112 if (fBootPort
== 0) {
113 if ((res
= task_get_bootstrap_port(task
, &fBootPort
)) != KERN_SUCCESS
) {
114 jack_error("Allocate: Can't find bootstrap mach port err = %s", mach_error_string(res
));
119 if ((res
= semaphore_create(task
, &fSemaphore
, SYNC_POLICY_FIFO
, value
)) != KERN_SUCCESS
) {
120 jack_error("Allocate: can create semaphore err = %s", mach_error_string(res
));
124 if ((res
= bootstrap_register(fBootPort
, fName
, fSemaphore
)) != KERN_SUCCESS
) {
125 jack_error("Allocate: can't check in mach semaphore name = %s err = %s", fName
, mach_error_string(res
));
128 case BOOTSTRAP_SUCCESS
:
129 /* service not currently registered, "a good thing" (tm) */
131 case BOOTSTRAP_NOT_PRIVILEGED
:
132 jack_log("bootstrap_register(): bootstrap not privileged");
134 case BOOTSTRAP_SERVICE_ACTIVE
:
135 jack_log("bootstrap_register(): bootstrap service active");
138 jack_log("bootstrap_register() err = %s", mach_error_string(res
));
145 jack_log("JackMachSemaphore::Allocate name = %s", fName
);
149 // Client side : get the published semaphore from server
150 bool JackMachSemaphore::ConnectInput(const char* name
, const char* server_name
)
152 BuildName(name
, server_name
, fName
);
155 // Temporary... A REVOIR
157 if (fSemaphore > 0) {
158 jack_log("Already connected name = %s", name);
163 if (fBootPort
== 0) {
164 if ((res
= task_get_bootstrap_port(mach_task_self(), &fBootPort
)) != KERN_SUCCESS
) {
165 jack_error("Connect: can't find bootstrap port err = %s", mach_error_string(res
));
170 if ((res
= bootstrap_look_up(fBootPort
, fName
, &fSemaphore
)) != KERN_SUCCESS
) {
171 jack_error("Connect: can't find mach semaphore name = %s err = %s", fName
, mach_error_string(res
));
175 jack_log("JackMachSemaphore::Connect name = %s ", fName
);
179 bool JackMachSemaphore::Connect(const char* name
, const char* server_name
)
181 return ConnectInput(name
, server_name
);
184 bool JackMachSemaphore::ConnectOutput(const char* name
, const char* server_name
)
186 return ConnectInput(name
, server_name
);
189 bool JackMachSemaphore::Disconnect()
191 if (fSemaphore
> 0) {
192 jack_log("JackMachSemaphore::Disconnect name = %s", fName
);
199 // Server side : destroy the JackGlobals
200 void JackMachSemaphore::Destroy()
204 if (fSemaphore
> 0) {
205 jack_log("JackMachSemaphore::Destroy");
206 if ((res
= semaphore_destroy(mach_task_self(), fSemaphore
)) != KERN_SUCCESS
) {
207 jack_error("JackMachSemaphore::Destroy can't destroy semaphore err = %s", mach_error_string(res
));
211 jack_error("JackMachSemaphore::Destroy semaphore < 0");
215 } // end of namespace