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  /system/extras/simpleperf/
event_fd.cpp 217 // read_head write_head
219 // So simpleperf can read records in [read_head, write_head), and the kernel
220 // can write records in [write_head, read_head). The kernel is responsible
221 // for updating write_head, and simpleperf is responsible for updating
225 size_t write_head = local
230 if (read_head == write_head) {
235 if (read_head < write_head) {
236 read_bytes = write_head - read_head;
238 read_bytes = mmap_data_buffer_size_ - read_head + write_head;
251 if (read_head < write_head) {
    [all...]
UnixSocket.h 69 uint32_t write_head = (read_head_ + valid_bytes_) % data_.size(); local
70 if (message.len <= data_.size() - write_head) {
71 memcpy(data_.data() + write_head, &message, message.len);
73 uint32_t len1 = data_.size() - write_head;
74 memcpy(data_.data() + write_head, &message, len1);

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