void
JVMSPI_CheckEvents(JVMSPI_BlockedThreadInfo * blocked_threads,
int blocked_threads_count, jlong timeout_milli_seconds)
{
//
// Nothing to do on behalf of bsd sockets!
//
// Copy this function to your favorite place and
// add your event checking code for any other stuff than bsd sockets.
if (JVM_IsDebuggerActive()) {
JVM_ProcessDebuggerCmds();
}
#if NOT_CURRENTLY_USED
// Enable this portion if you want to perform polling
// with increasing timeouts
#define MIN_POLL_MILLI_SECONDS 1
#define MAX_POLL_MILLI_SECONDS 5000
static int poll_interval_milli_seconds = MIN_POLL_MILLI_SECONDS;
if (timeout_milli_seconds < 0) {
// There seems to be no active thread right now
// Poll in increasing intervals
poll_interval_milli_seconds *= 2;
if (poll_interval_milli_seconds > MAX_POLL_MILLI_SECONDS) {
poll_interval_milli_seconds = MAX_POLL_MILLI_SECONDS;
}
timeout_milli_seconds = poll_interval_milli_seconds;
} else {
// We have encountered an active thread again
// Reset the polling wait to minimum
poll_interval_milli_seconds = MIN_POLL_MILLI_SECONDS;
}
#endif
ANI_WaitForThreadUnblocking(blocked_threads, blocked_threads_count,
timeout_milli_seconds);
// Implement alternating polling by enabling the code above
// and then adding your own checking code
// for additional event sources here
}
void JVMSPI_CheckEvents(JVMSPI_BlockedThreadInfo * blocked_threads,
int blocked_threads_count, jlong timeout_milli_seconds)
{
fd_set read_fds;
fd_set write_fds;
fd_set except_fds;
int i, num_fds, num_ready;
bool debugger_active = JVM_IsDebuggerActive();
#if ENABLE_JAVA_DEBUGGER
int dbg_socket_fd = -1;
if (debugger_active) {
dbg_socket_fd = JVM_GetDebuggerSocketFd();
}
#endif
FD_ZERO(&read_fds);
FD_ZERO(&write_fds);
FD_ZERO(&except_fds);
// [1] Gather the FDs that we want to check event for
num_fds = 1;
for (i=0; i<blocked_threads_count; i++) {
BlockingSocket *socket = (BlockingSocket *)blocked_threads[i].reentry_data;
if (socket->check_flags & CHECK_READ) {
FD_SET(socket->fd, &read_fds);
}
if (socket->check_flags & CHECK_WRITE) {
FD_SET(socket->fd, &write_fds);
}
if (socket->check_flags & CHECK_EXCEPTION) {
FD_SET(socket->fd, &except_fds);
}
if (num_fds < socket->fd) {
num_fds = socket->fd;
}
}
#if ENABLE_JAVA_DEBUGGER
if (debugger_active) {
if (dbg_socket_fd != -1) {
FD_SET(dbg_socket_fd, &read_fds);
if (num_fds < dbg_socket_fd) {
num_fds = dbg_socket_fd;
}
}
}
#endif
// [2] Call select() on the FDs, without appropriate timeout value
if (timeout_milli_seconds < 0) {
// Sleep forever until an event happens
GUARANTEE(blocked_threads_count > 0,
"can't sleep forever with no event sources!");
num_ready = jvm_select(num_fds+1, &read_fds, &write_fds, &except_fds,
NULL);
} else if (!debugger_active && blocked_threads_count == 0) {
// It's better to call Os::sleep than select() with no fds -- WinSock
// returns immediately with an error status if you don't pass any
// fds.
Os::sleep(timeout_milli_seconds);
num_ready = 0;
} else {
jlong sec, usec;
struct timeval timeout;
sec = timeout_milli_seconds / 1000;
usec = (timeout_milli_seconds % 1000) * 1000;
if (msw(sec) <= 0) {
timeout.tv_sec = lsw(sec);
} else {
// mmmm, are you sure you want to sleep so long??
timeout.tv_sec = 0x7fffffff;
}
timeout.tv_usec = lsw(usec);
num_ready = jvm_select(num_fds+1, &read_fds, &write_fds, &except_fds,
&timeout);
}
// [3] If a thread's FD is ready, change the thread's status to ready
if (num_ready > 0) {
for (i = 0; i < blocked_threads_count; i++) {
BlockingSocket *socket =
(BlockingSocket *)blocked_threads[i].reentry_data;
jboolean is_ready = KNI_FALSE;
if (socket->check_flags & CHECK_READ) {
if (FD_ISSET(socket->fd, &read_fds)) {
is_ready = KNI_TRUE;
}
}
if (socket->check_flags & CHECK_WRITE) {
if (FD_ISSET(socket->fd, &write_fds)) {
is_ready = KNI_TRUE;
}
}
if (socket->check_flags & CHECK_EXCEPTION) {
if (FD_ISSET(socket->fd, &except_fds)) {
// This happens only if a connect() call failed. Let's close
// the socket and make sure open0() returns -1:
//
// Note to QA: this block needs more testing!
jvm_shutdown(socket->fd, 2);
closesocket(socket->fd);
socket->fd = -1;
is_ready = KNI_TRUE;
}
}
if (is_ready) {
SNI_UnblockThread(blocked_threads[i].thread_id);
}
}
#if ENABLE_JAVA_DEBUGGER
if (debugger_active) {
if (FD_ISSET(dbg_socket_fd, &read_fds)) {
JVM_ProcessDebuggerCmds();
}
}
#endif
}
}
void FOX_FASTCALL(midp_check_events)(jlonglong timeout) {
#else
void midp_check_events(JVMSPI_BlockedThreadInfo *blocked_threads,
int blocked_threads_count,
jlong timeout) {
if (midp_waitWhileSuspended()) {
/* System has been requested to resume. Returning control to VM
* to perform java-side resume routines. Timeout may be too long
* here or even -1, thus do not check other events this time.
*/
return;
}
#endif
newSignal.waitingFor = NO_SIGNAL;
newSignal.pResult = ADDR_ZERO;
MIDP_EVENT_INITIALIZE(newMidpEvent);
checkForSystemSignal(&newSignal, &newMidpEvent, timeout);
switch (newSignal.waitingFor) {
#if ENABLE_JAVA_DEBUGGER
case VM_DEBUG_SIGNAL:
if (midp_isDebuggerActive()) {
JVM_ProcessDebuggerCmds();
}
break;
#endif // ENABLE_JAVA_DEBUGGER
case AMS_SIGNAL:
midpStoreEventAndSignalAms(newMidpEvent);
break;
case UI_SIGNAL:
midpStoreEventAndSignalForeground(newMidpEvent);
break;
case NETWORK_READ_SIGNAL:
#ifdef FEATURE_PHONEME
FASTIVA_DBREAK();
#else
if (eventUnblockJavaThread(blocked_threads,
blocked_threads_count, newSignal.waitingFor,
newSignal.descriptor,
newSignal.status))
/* Processing is done in eventUnblockJavaThread. */;
else if (findPushBlockedHandle(newSignal.descriptor) != 0) {
/* The push system is waiting for a read on this descriptor */
midp_thread_signal_list(blocked_threads, blocked_threads_count,
PUSH_SIGNAL, 0, 0);
}
#endif
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
else
jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor);
#endif
break;
case HOST_NAME_LOOKUP_SIGNAL:
case NETWORK_WRITE_SIGNAL:
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
if (!jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor))
#endif
#ifdef FEATURE_PHONEME
FASTIVA_DBREAK();
#else
midp_thread_signal_list(blocked_threads, blocked_threads_count,
newSignal.waitingFor, newSignal.descriptor,
newSignal.status);
#endif
break;
case NETWORK_EXCEPTION_SIGNAL:
#ifdef FEATURE_PHONEME
FASTIVA_DBREAK();
#else
/* Find both the read and write threads and signal the status. */
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
NETWORK_READ_SIGNAL, newSignal.descriptor,
newSignal.status);
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
NETWORK_WRITE_SIGNAL, newSignal.descriptor,
newSignal.status);
#endif
return;
case PUSH_ALARM_SIGNAL:
#ifdef FEATURE_PHONEME
FASTIVA_DBREAK();
#else
if (findPushTimerBlockedHandle(newSignal.descriptor) != 0) {
/* The push system is waiting for this alarm */
midp_thread_signal_list(blocked_threads,
blocked_threads_count, PUSH_SIGNAL, 0, 0);
}
#endif
break;
#if (ENABLE_JSR_135 || ENABLE_JSR_234)
case MEDIA_EVENT_SIGNAL:
StoreMIDPEventInVmThread(newMidpEvent, newMidpEvent.MM_ISOLATE);
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
MEDIA_EVENT_SIGNAL, newSignal.descriptor,
newSignal.status);
break;
case MEDIA_SNAPSHOT_SIGNAL:
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
MEDIA_SNAPSHOT_SIGNAL, newSignal.descriptor,
newSignal.status);
break;
#endif
#ifdef ENABLE_JSR_179
case JSR179_LOCATION_SIGNAL:
midp_thread_signal_list(blocked_threads,
blocked_threads_count, JSR179_LOCATION_SIGNAL, newSignal.descriptor, newSignal.status);
break;
#endif /* ENABLE_JSR_179 */
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
case WMA_SMS_READ_SIGNAL:
case WMA_CBS_READ_SIGNAL:
case WMA_MMS_READ_SIGNAL:
case WMA_SMS_WRITE_SIGNAL:
case WMA_MMS_WRITE_SIGNAL:
jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor);
break;
#endif
#ifdef ENABLE_JSR_177
case CARD_READER_DATA_SIGNAL:
midp_thread_signal_list(blocked_threads, blocked_threads_count,
newSignal.waitingFor, newSignal.descriptor,
newSignal.status);
break;
#endif /* ENABLE_JSR_177 */
default:
break;
} /* switch */
}
/**
* Runs the VM in either master or slave mode depending on the
* platform. It does not return until the VM is finished. In slave mode
* it will contain a system event loop.
*
* @param classPath string containing the class path
* @param mainClass string containing the main class for the VM to run.
* @param argc the number of arguments to pass to the main method
* @param argv the arguments to pass to the main method
*
* @return exit status of the VM
*/
#if 0
int midpRunVm(JvmPathChar* classPath,
char* mainClass,
int argc,
char** argv) {
/* Master mode does not need VM time slice requests. */
midp_thread_set_timeslice_proc(ADDR_ZERO);
return JVM_Start(classPath, mainClass, argc, argv);
}
/*
* This function is called by the VM periodically. It has to check if
* any of the blocked threads are ready for execution, and call
* SNI_UnblockThread() on those threads that are ready.
*
* Values for the <timeout> paramater:
* >0 = Block until an event happens, or until <timeout> milliseconds
* has elapsed.
* 0 = Check the events sources but do not block. Return to the
* caller immediately regardless of the status of the event sources.
* -1 = Do not timeout. Block until an event happens.
*/
void midp_check_events(JVMSPI_BlockedThreadInfo *blocked_threads,
int blocked_threads_count,
jlong timeout) {
if (midp_waitWhileSuspended()) {
/* System has been requested to resume. Returning control to VM
* to perform java-side resume routines. Timeout may be too long
* here or even -1, thus do not check other events this time.
*/
return;
}
newSignal.waitingFor = 0;
newSignal.pResult = NULL;
MIDP_EVENT_INITIALIZE(newMidpEvent);
checkForSystemSignal(&newSignal, &newMidpEvent, timeout);
switch (newSignal.waitingFor) {
#if ENABLE_JAVA_DEBUGGER
case VM_DEBUG_SIGNAL:
if (midp_isDebuggerActive()) {
JVM_ProcessDebuggerCmds();
}
break;
#endif // ENABLE_JAVA_DEBUGGER
case AMS_SIGNAL:
midpStoreEventAndSignalAms(newMidpEvent);
break;
case UI_SIGNAL:
midpStoreEventAndSignalForeground(newMidpEvent);
break;
case NETWORK_READ_SIGNAL:
if (eventUnblockJavaThread(blocked_threads,
blocked_threads_count, newSignal.waitingFor,
newSignal.descriptor,
newSignal.status))
/* Processing is done in eventUnblockJavaThread. */;
else if (findPushBlockedHandle(newSignal.descriptor) != 0) {
/* The push system is waiting for a read on this descriptor */
midp_thread_signal_list(blocked_threads, blocked_threads_count,
PUSH_SIGNAL, 0, 0);
}
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
else
jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor);
#endif
break;
case HOST_NAME_LOOKUP_SIGNAL:
case NETWORK_WRITE_SIGNAL:
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
if (!jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor))
#endif
midp_thread_signal_list(blocked_threads, blocked_threads_count,
newSignal.waitingFor, newSignal.descriptor,
newSignal.status);
break;
case NETWORK_EXCEPTION_SIGNAL:
/* Find both the read and write threads and signal the status. */
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
NETWORK_READ_SIGNAL, newSignal.descriptor,
newSignal.status);
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
NETWORK_WRITE_SIGNAL, newSignal.descriptor,
newSignal.status);
return;
case PUSH_ALARM_SIGNAL:
if (findPushTimerBlockedHandle(newSignal.descriptor) != 0) {
/* The push system is waiting for this alarm */
midp_thread_signal_list(blocked_threads,
blocked_threads_count, PUSH_SIGNAL, 0, 0);
}
break;
#if (ENABLE_JSR_135 || ENABLE_JSR_234)
case MEDIA_EVENT_SIGNAL:
StoreMIDPEventInVmThread(newMidpEvent, newMidpEvent.MM_ISOLATE);
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
MEDIA_EVENT_SIGNAL, newSignal.descriptor,
newSignal.status);
break;
case MEDIA_SNAPSHOT_SIGNAL:
eventUnblockJavaThread(blocked_threads, blocked_threads_count,
MEDIA_SNAPSHOT_SIGNAL, newSignal.descriptor,
newSignal.status);
break;
#endif
#ifdef ENABLE_JSR_179
case JSR179_LOCATION_SIGNAL:
midp_thread_signal_list(blocked_threads,
blocked_threads_count, JSR179_LOCATION_SIGNAL, newSignal.descriptor, newSignal.status);
break;
#endif /* ENABLE_JSR_179 */
#if (ENABLE_JSR_120 || ENABLE_JSR_205)
case WMA_SMS_READ_SIGNAL:
case WMA_CBS_READ_SIGNAL:
case WMA_MMS_READ_SIGNAL:
case WMA_SMS_WRITE_SIGNAL:
case WMA_MMS_WRITE_SIGNAL:
jsr120_check_signal(newSignal.waitingFor, newSignal.descriptor);
break;
#endif
#ifdef ENABLE_JSR_177
case CARD_READER_DATA_SIGNAL:
midp_thread_signal_list(blocked_threads, blocked_threads_count,
newSignal.waitingFor, newSignal.descriptor,
newSignal.status);
break;
#endif /* ENABLE_JSR_177 */
default:
break;
} /* switch */
}