/**
* Get maximal allowed number of isolates in the case of MVM mode.
* For SVM, simply return 1.
*/
int getMaxIsolates() {
#if ENABLE_MULTIPLE_ISOLATES
static int midpMaxIsolates = 0;
if (midpMaxIsolates == 0) {
int jvmMaxIsolates = JVM_MaxIsolates();
midpMaxIsolates = getInternalPropertyInt("MAX_ISOLATES");
if (0 == midpMaxIsolates) {
REPORT_INFO(LC_AMS, "MAX_ISOLATES property not set");
midpMaxIsolates = MAX_ISOLATES;
}
if (midpMaxIsolates > jvmMaxIsolates){
REPORT_WARN1(LC_AMS,
"MAX_ISOLATES exceeds VM limit %d, decreased", jvmMaxIsolates);
midpMaxIsolates = jvmMaxIsolates;
}
setMaxIsolates(midpMaxIsolates);
}
return midpMaxIsolates;
#else
return 1;
#endif /* ENABLE_MULTIPLE_ISOLATES */
}
/**
* Initializes the event system.
* <p>
* <b>NOTE:</b> The event system must be explicitly initialize so the
* VM can shutdown and restart cleanly.
*
* @return 0 for success, or non-zero if the MIDP implementation is
* out of memory
*/
int
InitializeEvents(void) {
int sizeInBytes;
if (NULL != pEventQueues) {
/* already done */
return 0;
}
#if ENABLE_MULTIPLE_ISOLATES
maxIsolates = JVM_MaxIsolates();
#endif
sizeInBytes = maxIsolates * sizeof (EventQueue);
pEventQueues = midpMalloc(sizeInBytes);
if (NULL == pEventQueues) {
return -1;
}
memset(pEventQueues, 0, sizeInBytes);
midp_createEventQueueLock();
return 0;
}
/**
* Shutdowns Links subsystem.
*/
void midp_links_shutdown() {
if (portals != NULL) {
int i;
for (i = 0; i < JVM_MaxIsolates(); i++) {
portal_free(&portals[i]);
}
pcsl_mem_free(portals);
portals = NULL;
}
}
/**
* private static native void setLinks0(int isolateid, Link[] linkarray);
*/
KNIEXPORT KNI_RETURNTYPE_VOID
Java_com_sun_midp_links_LinkPortal_setLinks0(void)
{
int targetIsolate;
int len;
int i;
int ok = 1;
rendezvous *rp;
rendezvous **newrppa = NULL;
KNI_StartHandles(2);
KNI_DeclareHandle(linkArray);
KNI_DeclareHandle(linkObj);
targetIsolate = KNI_GetParameterAsInt(1);
KNI_GetParameterAsObject(2, linkArray);
if (KNI_IsNullHandle(linkArray)) {
len = 0;
} else {
len = KNI_GetArrayLength(linkArray);
}
for (i = 0; i < len; i++) {
KNI_GetObjectArrayElement(linkArray, i, linkObj);
rp = getNativePointer(linkObj);
if (rp == NULL || rp->state == CLOSED) {
ok = 0;
KNI_ThrowNew(midpIllegalArgumentException, NULL);
break;
}
}
if (ok && portals == NULL) {
portals =
(portal *)pcsl_mem_malloc(JVM_MaxIsolates() * sizeof(portal));
if (portals == NULL) {
ok = 0;
KNI_ThrowNew(midpOutOfMemoryError, NULL);
} else {
int i;
for (i = 0; i < JVM_MaxIsolates(); i++) {
portals[i].count = -1;
portals[i].rppa = NULL;
}
}
}
if (ok && len > 0) {
newrppa = (rendezvous **)pcsl_mem_malloc(len * sizeof(rendezvous *));
if (newrppa == NULL) {
KNI_ThrowNew(midpOutOfMemoryError, NULL);
ok = 0;
}
}
if (ok) {
portal *pp = &portals[targetIsolate];
portal_free(pp);
/* at this point the portal's count is zero and rppa is null */
if (len > 0) {
for (i = 0; i < len; i++) {
KNI_GetObjectArrayElement(linkArray, i, linkObj);
rp = getNativePointer(linkObj);
/* rp not null, checked above */
newrppa[i] = rp;
rp_incref(rp);
}
pp->count = len;
pp->rppa = newrppa;
} else if (KNI_IsNullHandle(linkArray)) {
pp->count = -1;
pp->rppa = NULL;
} else {
/* len == 0 */
pp->count = 0;
pp->rppa = NULL;
}
midp_thread_signal(LINK_PORTAL_SIGNAL, targetIsolate, 0);
}
KNI_EndHandles();
KNI_ReturnVoid();
}
