read blocking
什麼是blocking I/O？ 當user process 透過read/write system call 讀取硬體資料時，會有哪些情況出現？請注意，這裡講的是「user process」，並不是驅動程式的system call 實作（driver function、fops->read 或fops->write）。以user process 呼叫read() 來讀取硬體資料的案例來說，當然免不了就是以下的情況：. 1.,EAGAIN The file descriptor fd refers to a file other than a socket and has been marked nonblocking (O_NONBLOCK), and the read would block. See open(2) for further details on the O_NONBLOCK flag. EAGAIN or EWOULDBLOCK The file descriptor fd refers to a soc
| 相關軟體 Write! 資訊 | |
|---|---|
 read blocking 相關參考資料
Blocking and Non-Blocking I0 | Linux Magazine
Blocking and Non-Blocking I/0. In previous columns, we've looked at the Linux file model, and discussed many of the Linux system calls. This month, we're going to talk a bit more about the se... http://www.linux-mag.com Linux 驅動程式的IO, #4: 什麼是Blocking IO - jollen
什麼是blocking I/O？ 當user process 透過read/write system call 讀取硬體資料時，會有哪些情況出現？請注意，這裡講的是「user process」，並不是驅動程式的system call 實作（driver function、fops->read 或fops->write）。以user process 呼叫read() 來讀取硬體資料的案... http://www.jollen.org read(2) - Linux manual page - man7.org
EAGAIN The file descriptor fd refers to a file other than a socket and has been marked nonblocking (O_NONBLOCK), and the read would block. See open(2) for further details on the O_NONBLOCK flag. EAGAI... http://man7.org c - read() is not blocking in socket programming - Stack Overflow
There may be several cause and several exceptions are possible at different place: check socket where you create: sockfd=socket(AF_INET,SOCK_STREAM,0); if (sockfd==-1) perror("Create socket&quo... https://stackoverflow.com Linux Blocking vs. non Blocking Serial Read - Stack Overflow
The conventional definition of a "blocking" versus "nonblocking" read is based on "when" the read call will return to your program (and resume execute with the next stat... https://stackoverflow.com c++ - What is the difference between a blocking and non-blocking ...
Blocking means that execution of your code (in that thread) will stop for the duration of the call. Essentially, the function call will not return until the blocking operation is complete. A blocking... https://stackoverflow.com c - Non-blocking call for reading descriptor - Stack Overflow
int flags = fcntl(fd, F_GETFL, 0); fcntl(fd, F_SETFL, flags | O_NONBLOCK);. The code snippet above will configure such a descriptor for non-blocking access. If data is not available when you call rea... https://stackoverflow.com Java InputStream blocking read - Stack Overflow
The underlying data source for some implementations of InputStream can signal that the end of the stream has been reached, and no more data will be sent. Until this signal is received, read operation... https://stackoverflow.com c - Blocking read until specified number bytes arrived - Stack ...
How about this: #define BUFFER_SIZE 10 char buffer[BUFFER_SIZE]; /* ... */ size_t total_read = 0; size_t total_left = BUFFER_SIZE; /* The total size of the buffer */ char *buffer_pointer = buffer; /*... https://stackoverflow.com read(3): read from file - Linux man page
When attempting to read a file (other than a pipe or FIFO) that supports non-blocking reads and has no data currently available: *: If O_NONBLOCK is set, read() shall return -1 and set errno to [EAGAI... https://linux.die.net |