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 void JackMachSemaphore::BuildName(const char* client_name, const char* server_name, char* res, int size)
31 char ext_client_name[SYNC_MAX_NAME_SIZE + 1];
32 JackTools::RewriteName(client_name, ext_client_name);
33 snprintf(res, size, "jacksem.%d_%s_%s", JackTools::GetUID(), server_name, ext_client_name);
36 bool JackMachSemaphore::Signal()
39 jack_error("JackMachSemaphore::Signal name = %s already deallocated!!", fName);
48 if ((res = semaphore_signal(fSemaphore)) != KERN_SUCCESS) {
49 jack_error("JackMachSemaphore::Signal name = %s err = %s", fName, mach_error_string(res));
51 return (res == KERN_SUCCESS);
54 bool JackMachSemaphore::SignalAll()
57 jack_error("JackMachSemaphore::SignalAll name = %s already deallocated!!", 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 deallocated!!", 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 deallocated!!", 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, sizeof(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 = %i:%s", res, mach_error_string(res));
124 if ((res = bootstrap_register(fBootPort, fName, fSemaphore)) != KERN_SUCCESS) {
126 case BOOTSTRAP_SUCCESS :
127 jack_log("bootstrap_register(): bootstrap success");
128 /* service not currently registered, "a good thing" (tm) */
131 case BOOTSTRAP_NOT_PRIVILEGED :
132 jack_log("bootstrap_register(): bootstrap not privileged");
133 /* might belong to a previously running jack process that crashed, let's try to connect */
136 if (semaphore_create(task, &sem, SYNC_POLICY_FIFO, value) == KERN_SUCCESS)
138 const bool ok = (bootstrap_look_up(fBootPort, fName, &sem) == KERN_SUCCESS);
139 semaphore_destroy(mach_task_self(), sem);
143 jack_error("bootstrap_register(): forced connection");
150 case BOOTSTRAP_SERVICE_ACTIVE :
151 jack_log("bootstrap_register(): bootstrap service active");
155 jack_log("bootstrap_register() err = %i:%s", res, mach_error_string(res));
159 jack_error("Allocate: can't check in mach semaphore name = %s err = %i:%s", fName, res, mach_error_string(res));
163 jack_log("JackMachSemaphore::Allocate name = %s", fName);
167 // Client side : get the published semaphore from server
168 bool JackMachSemaphore::ConnectInput(const char* name, const char* server_name)
170 BuildName(name, server_name, fName, sizeof(fName));
173 if (fBootPort == 0) {
174 if ((res = task_get_bootstrap_port(mach_task_self(), &fBootPort)) != KERN_SUCCESS) {
175 jack_error("Connect: can't find bootstrap port err = %s", mach_error_string(res));
180 if ((res = bootstrap_look_up(fBootPort, fName, &fSemaphore)) != KERN_SUCCESS) {
181 jack_error("Connect: can't find mach semaphore name = %s err = %s", fName, mach_error_string(res));
185 jack_log("JackMachSemaphore::Connect name = %s ", fName);
189 bool JackMachSemaphore::Connect(const char* name, const char* server_name)
191 return ConnectInput(name, server_name);
194 bool JackMachSemaphore::ConnectOutput(const char* name, const char* server_name)
196 return ConnectInput(name, server_name);
199 bool JackMachSemaphore::Disconnect()
201 if (fSemaphore > 0) {
202 jack_log("JackMachSemaphore::Disconnect name = %s", fName);
209 // Server side : destroy the JackGlobals
210 void JackMachSemaphore::Destroy()
214 if (fSemaphore > 0) {
215 jack_log("JackMachSemaphore::Destroy name = %s", fName);
216 if ((res = semaphore_destroy(mach_task_self(), fSemaphore)) != KERN_SUCCESS) {
217 jack_error("JackMachSemaphore::Destroy can't destroy semaphore err = %s", mach_error_string(res));
221 jack_error("JackMachSemaphore::Destroy semaphore < 0");
225 } // end of namespace