Evbuffer_drain crash
WebJul 27, 2024 · evbuffer_remove()删除buf前面的datlen的字节并且拷贝到内存。如果比datlen的长度小，那就全部拷贝。出错返回-1，正常返回拷贝的字节数。 … WebApr 12, 2024 · Contributor. (actually http layer in libevent has default timeouts, 50 seconds for read/write, but AFAICS you do not use it, only bufferevents which doesn't have any default timeouts) feel free to reopen if you still observe such behaviour and have more details (for example proof that this is the libevent fault).
Evbuffer_drain crash
Did you know?
evbuffer_remove()函数从buf前面复制和移除datlen字节到data内存中。如果可用字节少于datlen，函数复制所有字节。函数失败时返回-1，否则返回复制了的字节数。 evbuffer_drain()函数的行为与evbuffer_remove()相同，只是它不进行数据复制：而只是将数据从缓冲区前面移除。成功时返回0，失败时返回-1。 … See more 这两个函数的功能很简明：evbuffer_new()分配和返回一个新的空evbuffer；而evbuffer_free()释放evbuffer和其内容。 这两个函数 … See more 这个函数向buf 的末尾添加 datalen 字节的数据data。 函数在成功时返回0， 失败时返回-1. 这些函数添加格式化的数据到buf末尾。格式参数fmt和其他参数的处理分别与C库函数printf和vprintf相同。函数返回添加的字节数。 这个函数 … See more 默认情况下，在多个线程中同时访问evbuffer是不安全的。如果需要这样的访问，可以在evbuffer 上调用evbuffer_enable_locking() … See more 为提高效率，libevent具有将数据从一个evbuffer移动到另一个的优化函数。 函数evbuffer_add_buffer()将src中的所有数据移动到dst末尾，成功时返回0，失败时返回-1。 evbuffer_remove_buffer()函数从src中移动datlen字节到dst … See more WebThe caller must fix up buf->last and buf->first. * as needed; they might have been freed. */. static struct evbuffer_chain **. evbuffer_free_trailing_empty_chains (struct evbuffer *buf) {. struct evbuffer_chain **ch = buf->last_with_datap; /* Find the first victim chain. It might be *last_with_datap */.
WebA IO Buffer C lib extract from the implementation of evbuffer in libevent - GitHub - xingshuo/buffer_queue: A IO Buffer C lib extract from the implementation of evbuffer in libevent ... queue_expand 预扩展缓存队列 buffer_queue_copyout 查看缓存中队列数据 buffer_queue_drain 删除缓存队列中数据 buffer_queue_remove ... WebWhen you call evbuffer_drain() it doesn't free() resources, it basically just resets the pointer back to the start of the buffer. It sounds like you may want to keep a seperate evbuffer …
WebJan 25, 2024 · 3 Answers Sorted by: 3 Sounds like you want to use ev_ssize_t evbuffer_copyout (struct evbuffer *buf, void *data, size_t datalen) It copies the buffer … WebDec 10, 2015 · It will make your rogram crash exactly at the moment of accessing an illegal address in the heap. The other way is to use built-in debug capabilities of GNU malloc. See man mcheck. If you call mcheck_pedantic before the first call to malloc, then every memory block is checked at every allocation.
http://www.cppblog.com/mysileng/archive/2013/02/05/197748.html
WebAn evbuffer can be used for preparing data before sending it to the network or conversely for reading data from the network. Evbuffers try to avoid memory copies as much as possible. As a result, evbuffers can be used to pass data around without actually incurring the overhead of copying the data. example of continuity theory of agingexample of contra assetWebAug 31, 2016 · Checking socket buffer without drain it. I have the following sample using libevent , the epoll library : void read_cb (struct bufferevent *bev, void *arg) { … example of continuity vs discontinuityWebJul 26, 2024 · evbuffer_drain () deletes size bytes from the beginning of the evbuffer buf. evbuffer_remove () reads and drains up to datlen bytes from the beginning of the … example of continuous development theoryWebApr 17, 2009 · This abstraction is called a buffered event. A buffered event provides input and output buffers that get filled and drained automatically. The user of a buffered event no longer deals directly with the I/O, but instead is reading from input and writing to … brunet state park wisconsinWebJun 1, 2024 · int evbuffer_drain (struct evbuffer *buf, size_tlen) Remove a specified number of bytes data from the beginning of an evbuffer. Parameters: buf the evbuffer to … example of continuous skill in footballWebSee Also. EventBuffer::read() - Read data from an evbuffer and drain the bytes read EventBuffer::appendFrom() - Moves the specified number of bytes from a source buffer … example of continuous innovation