void SinkBase::cb_data(mblk_t *m)
{
uint32_t st = mblk_get_timestamp_info(m);
mblk_t *fm = dupmsg(m);
mblk_meta_copy(m, fm);
MSQueue *queue = post_handle(fm); // 此处 dupmsg(m) 将不会导致 m 被释放
bool first = true;
unsigned char *obuf = 0;
size_t olen = 0;
int index = 0;
size_t off = 0;
bool key = false;
while (mblk_t *om = ms_queue_get(queue)) {
int dlen = size_for(index, om);
obuf = (unsigned char*)realloc(obuf, off + dlen);
save_for(index, om, obuf + off);
if (index == 0)
key = is_key(index, om);
index++;
off += dlen;
// 处理时间戳回绕
if (first_frame_) {
first_frame_ = false;
}
else {
uint32_t delta = st - last_stamp_;
// 检查，是否乱序，乱序包直接扔掉！
if (delta > 0x80000000) {
fprintf(stderr, "??? maybe timestamp confusioned!, curr=%u, last=%u\n", st, last_stamp_);
return;
}
next_stamp_ += delta / payload_freq();
}
last_stamp_ = st;
freemsg(om);
}
if (cb_data_ && obuf) {
cb_data_(opaque_, next_stamp_, obuf, off, key);
}
if (obuf) free(obuf);
}
E* MmapArrayAllocator<E, F>::allocate(size_t length) {
size_t size = size_for(length);
int alignment = os::vm_allocation_granularity();
char* addr = os::reserve_memory(size, NULL, alignment, F);
if (addr == NULL) {
vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "Allocator (reserve)");
}
os::commit_memory_or_exit(addr, size, !ExecMem, "Allocator (commit)");
return (E*)addr;
}
E* MmapArrayAllocator<E, F>::allocate_or_null(size_t length) {
size_t size = size_for(length);
int alignment = os::vm_allocation_granularity();
char* addr = os::reserve_memory(size, NULL, alignment, F);
if (addr == NULL) {
return NULL;
}
if (os::commit_memory(addr, size, !ExecMem, "Allocator (commit)")) {
return (E*)addr;
} else {
os::release_memory(addr, size);
return NULL;
}
}
E* MallocArrayAllocator<E, F>::allocate(size_t length) {
return (E*)AllocateHeap(size_for(length), F);
}
void MmapArrayAllocator<E, F>::free(E* addr, size_t length) {
bool result = os::release_memory((char*)addr, size_for(length));
assert(result, "Failed to release memory");
}