Am 10.02.2011 15:03, schrieb Artyom:
Probably it would be ok to provide some parameter on how to wait asynchronously:
typedef enum { wait_default, // using thread+waitpid per-process on POSIX OS wait_using_sigaction, // install signal handler wait_using_sigwaitinfo, // install signal handler wait_polling, // poll all waiting pids for end, when // requested - for example by user's signal // handler } wait_method_type;
void async_wait(pid ,method_type m = wait_default) #ifdef BOOST_POSIX void poll_handlers(); // check if child completed // called by user when receives sigchld endif
I believe this won't work because: On POSIX the interaction of signal-handlers and threads is not defined (it is not defined which thread gets the signal delivered). The recommended solution is to block the signals for all threads and declare a special thread which blocks in sigwait() for the desired signals. Oliver