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#include "include/types.h"
#include "msg/Message.h"
#include "osd/OSD.h"
#include "messages/MClass.h"
#include "ClassHandler.h"
#include <dlfcn.h>
#include <map>
#include "config.h"
#define DOUT_SUBSYS osd
#undef dout_prefix
#define dout_prefix *_dout << dbeginl
bool ClassHandler::load_class(string name)
{
bool need_request = false;
Mutex::Locker locker(mutex);
ClassData& class_data = objects[name];
switch (class_data.status) {
case CLASS_LOADED:
return true;
case CLASS_ERROR:
return false;
case CLASS_UNKNOWN:
class_data.status = CLASS_REQUESTED;
need_request = true;
break;
case CLASS_REQUESTED:
need_request = false;
break;
default:
assert(1);
}
if(need_request) {
osd->get_class(name.c_str());
}
if (!class_data.queue) {
if (!class_data.init_queue())
return false;
}
class_data.queue->Wait(mutex);
if (objects[name].status != CLASS_UNLOADED)
return false;
ClassImpl& impl=objects[name].impl;
dout(0) << "received class " << name << " size=" << impl.binary.length() << dendl;
char *fname=strdup("/tmp/class-XXXXXX");
int fd = mkstemp(fname);
for (list<bufferptr>::const_iterator it = impl.binary.buffers().begin();
it != impl.binary.buffers().end(); it++) {
write(fd, it->c_str(), it->length());
}
close(fd);
class_data.handle = dlopen(fname, RTLD_LAZY);
unlink(fname);
free(fname);
if (class_data.handle) {
dout(0) << "successfuly loaded class " << name << dendl;
} else {
dout(0) << "failed loading class " << name << dendl;
}
return (class_data.handle != NULL);
}
void ClassHandler::handle_response(MClass *m)
{
Mutex::Locker locker(mutex);
deque<ClassLibrary>::iterator info_iter;
deque<ClassImpl>::iterator impl_iter;
deque<bool>::iterator add_iter;
for (info_iter = m->info.begin(), add_iter = m->add.begin(), impl_iter = m->impl.begin();
info_iter != m->info.end();
++info_iter, ++add_iter) {
dout(0) << "handle_response class name=" << (*info_iter).name << dendl;
bool need_notify = false;
ClassData& data = objects[(*info_iter).name];
if (data.status == CLASS_REQUESTED) {
need_notify = true;
}
if (*add_iter) {
data.impl = *impl_iter;
++impl_iter;
data.status = CLASS_UNLOADED;
} else {
/* fixme: handle case in which we didn't get the class */
}
if (need_notify) {
data.queue->Signal();
}
}
}
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