On Tuesday, 3 October 2017 at 12:32:43 UTC, kdevel wrote:
IMHO a program should sleep (consume 0 CPU time and 0 energy)
if there is nothing to process. This is best accomplished by
not polling on a file descriptor in order to check if data has
arrived. If your program must yield() there's
On Tuesday, 3 October 2017 at 12:20:09 UTC, Oleg B wrote:
while (!tryWait(pp.pid).terminated)
{
auto cnt = read(fd, buf.ptr, buf.length); //
C-style reading
if (cnt == -1 && errno == EAGAIN) // C-style error
checking
yield();
On Tuesday, 3 October 2017 at 10:45:21 UTC, kdevel wrote:
On Tuesday, 3 October 2017 at 00:22:28 UTC, Oleg B wrote:
but get error "Resource temporarily unavailable".
You get EAGAIN because there is no data available at the time
of reading.
From the manpage of read:
ERRORS
EAGAIN
On Tuesday, 3 October 2017 at 11:36:28 UTC, Oleg B wrote:
EAGAIN Non-blocking I/O has been selected using
O_NONBLOCK and no data
was immediately available for reading.
And I can't check this without using exception handling?
Your programm shall not read before data is
On Tuesday, 3 October 2017 at 10:45:21 UTC, kdevel wrote:
On Tuesday, 3 October 2017 at 00:22:28 UTC, Oleg B wrote:
but get error "Resource temporarily unavailable".
You get EAGAIN because there is no data available at the time
of reading.
From the manpage of read:
ERRORS
EAGAIN
On Tuesday, 3 October 2017 at 00:22:28 UTC, Oleg B wrote:
but get error "Resource temporarily unavailable".
You get EAGAIN because there is no data available at the time of
reading.
From the manpage of read:
ERRORS
EAGAIN Non-blocking I/O has been selected using
O_NONBLOCK and no
Hello. I run program through std.process.pipeShell and want to
read from it stdout in loop. How do this non-blocking?
I try
int fd = p.stdout.fileno;
int flags = fcntl(fd, F_GETFL, 0);
flags |= O_NONBLOCK;
fcntl(fd, F_SETFL, flags);
but get error "Resource
