jack2/common/JackLibClient.cpp at develop · jackaudio/jack2 · GitHub

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This program is free software; you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation; either version 2.1 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include "JackLibClient.h"

#include "JackTime.h"

#include "JackLibGlobals.h"

#include "JackGlobals.h"

#include "JackPlatformPlug.h"

#include "JackTools.h"

namespace Jack

{

// Used for external C API (JackAPI.cpp)

JackGraphManager* GetGraphManager()

{

if (JackLibGlobals::fGlobals) {

return JackLibGlobals::fGlobals->fGraphManager;

} else {

return NULL;

}

JackEngineControl* GetEngineControl()

{

if (JackLibGlobals::fGlobals) {

return JackLibGlobals::fGlobals->fEngineControl;

} else {

return NULL;

}

JackSynchro* GetSynchroTable()

{

return (JackLibGlobals::fGlobals ? JackLibGlobals::fGlobals->fSynchroTable : 0);

}

JackMetadata* GetMetadata()

{

if (JackLibGlobals::fGlobals) {

return JackLibGlobals::fGlobals->fMetadata;

} else {

return NULL;

}

//-------------------

// Client management

//-------------------

ShutDown is called:

- from the RT thread when Execute method fails

- possibly from a "closed" notification channel

(Not needed since the synch object used (Sema of Fifo will fails when server quits... see ShutDown))

void JackLibClient::ShutDown(jack_status_t code, const char* message)

{

jack_log("JackLibClient::ShutDown");

JackGlobals::fServerRunning = false;

JackClient::ShutDown(code, message);

}

JackLibClient::JackLibClient(JackSynchro* table): JackClient(table)

{

jack_log("JackLibClient::JackLibClient table = %x", table);

fChannel = new JackClientChannel();

}

JackLibClient::~JackLibClient()

{

jack_log("JackLibClient::~JackLibClient");

delete fChannel;

}

int JackLibClient::Open(const char* server_name, const char* name, jack_uuid_t uuid, jack_options_t options, jack_status_t* status)

{

int shared_engine, shared_client, shared_graph, result;

bool res;

jack_log("JackLibClient::Open name = %s", name);

if (strlen(name) >= JACK_CLIENT_NAME_SIZE) {

jack_error("\"%s\" is too long to be used as a JACK client name.\n"

"Please use %lu characters or less",

name,

JACK_CLIENT_NAME_SIZE - 1);

return -1;

}

strncpy(fServerName, server_name, sizeof(fServerName));

fServerName[sizeof(fServerName) - 1] = 0;

// Open server/client channel

char name_res[JACK_CLIENT_NAME_SIZE+1];

if (fChannel->Open(server_name, name, uuid, name_res, this, options, status) < 0) {

jack_error("Cannot connect to the server");

goto error;

}

// Start receiving notifications

if (fChannel->Start() < 0) {

jack_error("Cannot start channel");

goto error;

}

// Require new client

fChannel->ClientOpen(name_res, JackTools::GetPID(), uuid, &shared_engine, &shared_client, &shared_graph, &result);

if (result < 0) {

jack_error("Cannot open %s client", name_res);

goto error;

}

try {

// Map shared memory segments

JackLibGlobals::fGlobals->fEngineControl.SetShmIndex(shared_engine, fServerName);

JackLibGlobals::fGlobals->fGraphManager.SetShmIndex(shared_graph, fServerName);

fClientControl.SetShmIndex(shared_client, fServerName);

JackGlobals::fVerbose = GetEngineControl()->fVerbose;

} catch (...) {

jack_error("Map shared memory segments exception");

goto error;

}

SetupDriverSync(false);

// Connect shared synchro : the synchro must be usable in I/O mode when several clients live in the same process

assert(JackGlobals::fSynchroMutex);

JackGlobals::fSynchroMutex->Lock();

res = fSynchroTable[GetClientControl()->fRefNum].Connect(name_res, fServerName);

JackGlobals::fSynchroMutex->Unlock();

if (!res) {

jack_error("Cannot ConnectSemaphore %s client", name_res);

goto error;

}

JackGlobals::fClientTable[GetClientControl()->fRefNum] = this;

SetClockSource(GetEngineControl()->fClockSource);

jack_log("JackLibClient::Open name = %s refnum = %ld", name_res, GetClientControl()->fRefNum);

return 0;

error:

fChannel->Stop();

fChannel->Close();

return -1;

}

// Notifications received from the server

// TODO this should be done once for all clients in the process, when a shared notification channel

// will be shared by all clients...

int JackLibClient::ClientNotifyImp(int refnum, const char* name, int notify, int sync, const char* message, int value1, int value2)

{

int res = 0;

assert(JackGlobals::fSynchroMutex);

JackGlobals::fSynchroMutex->Lock();

// Done all time

switch (notify) {

case kAddClient:

jack_log("JackClient::AddClient name = %s, ref = %ld ", name, refnum);

// the synchro must be usable in I/O mode when several clients live in the same process

res = fSynchroTable[refnum].Connect(name, fServerName) ? 0 : -1;

break;

case kRemoveClient:

jack_log("JackClient::RemoveClient name = %s, ref = %ld ", name, refnum);

if (GetClientControl() && strcmp(GetClientControl()->fName, name) != 0) {

res = fSynchroTable[refnum].Disconnect() ? 0 : -1;

}

break;

}

JackGlobals::fSynchroMutex->Unlock();

return res;

}

JackGraphManager* JackLibClient::GetGraphManager() const

{

assert(JackLibGlobals::fGlobals->fGraphManager);

return JackLibGlobals::fGlobals->fGraphManager;

}

JackEngineControl* JackLibClient::GetEngineControl() const

{

assert(JackLibGlobals::fGlobals->fEngineControl);

return JackLibGlobals::fGlobals->fEngineControl;

}

JackClientControl* JackLibClient::GetClientControl() const

{

return fClientControl;

}

} // end of namespace

jack2/common/JackLibClient.cpp at develop · jackaudio/jack2 · GitHub

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