static jint nativeWaitWakeup(JNIEnv *env, jobject clazz, jintArray outIrqs,
jobjectArray outReasons)
{
bool first_time = false;
if (outIrqs == NULL || outReasons == NULL) {
jniThrowException(env, "java/lang/NullPointerException", "null argument");
return -1;
}
// Register our wakeup callback if not yet done.
if (!wakeup_init) {
wakeup_init = true;
ALOGV("Creating semaphore...");
int ret = sem_init(&wakeup_sem, 0, 0);
if (ret < 0) {
char buf[80];
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error creating semaphore: %s\n", buf);
jniThrowException(env, "java/lang/IllegalStateException", buf);
return -1;
}
ALOGV("Registering callback...");
set_wakeup_callback(&wakeup_callback);
// First time through, we will just drain the current wakeup reasons.
first_time = true;
} else {
// On following calls, we need to wait for wakeup.
ALOGV("Waiting for wakeup...");
int ret = sem_wait(&wakeup_sem);
if (ret < 0) {
char buf[80];
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error waiting on semaphore: %s\n", buf);
// Return 0 here to let it continue looping but not return results.
return 0;
}
}
FILE *fp = fopen(LAST_RESUME_REASON, "r");
if (fp == NULL) {
ALOGE("Failed to open %s", LAST_RESUME_REASON);
return -1;
}
int numOut = env->GetArrayLength(outIrqs);
ScopedIntArrayRW irqs(env, outIrqs);
ALOGV("Reading up to %d wakeup reasons", numOut);
char mergedreason[MAX_REASON_SIZE];
char* mergedreasonpos = mergedreason;
int remainreasonlen = MAX_REASON_SIZE;
int firstirq = 0;
char reasonline[128];
int i = 0;
while (fgets(reasonline, sizeof(reasonline), fp) != NULL && i < numOut) {
char* pos = reasonline;
char* endPos;
// First field is the index.
int irq = (int)strtol(pos, &endPos, 10);
if (pos == endPos) {
// Ooops.
ALOGE("Bad reason line: %s", reasonline);
continue;
}
pos = endPos;
// Skip whitespace; rest of the buffer is the reason string.
while (*pos == ' ') {
pos++;
}
// Chop newline at end.
char* endpos = pos;
while (*endpos != 0) {
if (*endpos == '\n') {
*endpos = 0;
break;
}
endpos++;
}
// For now we are not separating out the first irq.
// This is because in practice there are always multiple
// lines of wakeup reasons, so it is better to just treat
// them all together as a single string.
if (false && i == 0) {
firstirq = irq;
} else {
int len = snprintf(mergedreasonpos, remainreasonlen,
i == 0 ? "%d" : ":%d", irq);
if (len >= 0 && len < remainreasonlen) {
mergedreasonpos += len;
remainreasonlen -= len;
}
}
int len = snprintf(mergedreasonpos, remainreasonlen, ":%s", pos);
if (len >= 0 && len < remainreasonlen) {
mergedreasonpos += len;
remainreasonlen -= len;
}
// For now it is better to combine all of these in to one entry in the
// battery history. In the future, it might be nice to figure out a way
// to efficiently store multiple lines as a single entry in the history.
//irqs[i] = irq;
//ScopedLocalRef<jstring> reasonString(env, env->NewStringUTF(pos));
//env->SetObjectArrayElement(outReasons, i, reasonString.get());
//ALOGV("Wakeup reason #%d: irw %d reason %s", i, irq, pos);
i++;
}
ALOGV("Got %d reasons", i);
if (first_time) {
i = 0;
}
if (i > 0) {
irqs[0] = firstirq;
*mergedreasonpos = 0;
ScopedLocalRef<jstring> reasonString(env, env->NewStringUTF(mergedreason));
env->SetObjectArrayElement(outReasons, 0, reasonString.get());
i = 1;
}
if (fclose(fp) != 0) {
ALOGE("Failed to close %s", LAST_RESUME_REASON);
return -1;
}
return first_time ? 0 : i;
}
static jint nativeWaitWakeup(JNIEnv *env, jobject clazz, jobject outBuf)
{
if (outBuf == NULL) {
jniThrowException(env, "java/lang/NullPointerException", "null argument");
return -1;
}
// Register our wakeup callback if not yet done.
if (!wakeup_init) {
wakeup_init = true;
ALOGV("Creating semaphore...");
int ret = sem_init(&wakeup_sem, 0, 0);
if (ret < 0) {
char buf[80];
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error creating semaphore: %s\n", buf);
jniThrowException(env, "java/lang/IllegalStateException", buf);
return -1;
}
ALOGV("Registering callback...");
set_wakeup_callback(&wakeup_callback);
}
// Wait for wakeup.
ALOGV("Waiting for wakeup...");
int ret = sem_wait(&wakeup_sem);
if (ret < 0) {
char buf[80];
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error waiting on semaphore: %s\n", buf);
// Return 0 here to let it continue looping but not return results.
return 0;
}
FILE *fp = fopen(LAST_RESUME_REASON, "r");
if (fp == NULL) {
ALOGE("Failed to open %s", LAST_RESUME_REASON);
return -1;
}
char* mergedreason = (char*)env->GetDirectBufferAddress(outBuf);
int remainreasonlen = (int)env->GetDirectBufferCapacity(outBuf);
ALOGV("Reading wakeup reasons");
char* mergedreasonpos = mergedreason;
char reasonline[128];
int i = 0;
while (fgets(reasonline, sizeof(reasonline), fp) != NULL) {
char* pos = reasonline;
char* endPos;
int len;
// First field is the index or 'Abort'.
int irq = (int)strtol(pos, &endPos, 10);
if (pos != endPos) {
// Write the irq number to the merged reason string.
len = snprintf(mergedreasonpos, remainreasonlen, i == 0 ? "%d" : ":%d", irq);
} else {
// The first field is not an irq, it may be the word Abort.
const size_t abortPrefixLen = strlen("Abort:");
if (strncmp(pos, "Abort:", abortPrefixLen) != 0) {
// Ooops.
ALOGE("Bad reason line: %s", reasonline);
continue;
}
// Write 'Abort' to the merged reason string.
len = snprintf(mergedreasonpos, remainreasonlen, i == 0 ? "Abort" : ":Abort");
endPos = pos + abortPrefixLen;
}
pos = endPos;
if (len >= 0 && len < remainreasonlen) {
mergedreasonpos += len;
remainreasonlen -= len;
}
// Skip whitespace; rest of the buffer is the reason string.
while (*pos == ' ') {
pos++;
}
// Chop newline at end.
char* endpos = pos;
while (*endpos != 0) {
if (*endpos == '\n') {
*endpos = 0;
break;
}
endpos++;
}
len = snprintf(mergedreasonpos, remainreasonlen, ":%s", pos);
if (len >= 0 && len < remainreasonlen) {
mergedreasonpos += len;
remainreasonlen -= len;
}
i++;
}
ALOGV("Got %d reasons", i);
if (i > 0) {
*mergedreasonpos = 0;
}
if (fclose(fp) != 0) {
ALOGE("Failed to close %s", LAST_RESUME_REASON);
return -1;
}
return mergedreasonpos - mergedreason;
}