Доброго времени суток. Мне понадобилось инкапсулировать POSIX таймер в C++ класс. Возникли проблемы с назначением callback. Говорит что нельзя делать метод класса колбэком.
вот текст сообщения компилятора:
g++-4.5 -std=c++0x -lrt main.cpp
main.cpp: In function ‘int main(int, char**)’:
main.cpp:69:28: error: argument of type ‘void (timer_handler::)(int, siginfo_t*, void*)’ does not match ‘void (*)(int, siginfo_t*, void*)’
Вот код:
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <time.h>
#define CLOCKID CLOCK_REALTIME
#define SIG SIGRTMIN
#define errExit(msg) do { perror(msg); exit(EXIT_FAILURE); \
} while (0)
static void print_siginfo(siginfo_t *si)
{
timer_t *tidp;
int orr;
tidp = (void**)&si->si_value.sival_ptr;
printf(" sival_ptr = %p; ", si->si_value.sival_ptr);
printf(" *sival_ptr = 0x%lx\n", (long) *tidp);
orr = timer_getoverrun(*tidp);
if (orr == -1)
errExit("timer_getoverrun");
else
printf(" overrun count = %d\n", orr);
}
class timer_handler
{
public:
void handler(int sig, siginfo_t *si, void *uc)
{
printf("Object Caught signal %d\n", sig);
print_siginfo(si);
signal(sig, SIG_IGN);
}
};
void handler(int sig, siginfo_t *si, void *uc)
{
printf("Function Caught signal %d\n", sig);
print_siginfo(si);
signal(sig, SIG_IGN);
}
timer_handler hndlr;
int main(int argc, char *argv[])
{
timer_t timerid;
struct sigevent sev;
struct itimerspec its;
long long freq_nanosecs;
sigset_t mask;
struct sigaction sa;
if (argc != 3) {
fprintf(stderr, "Usage: %s <sleep-secs> <freq-nanosecs>\n",
argv[0]);
exit(EXIT_FAILURE);
}
/* Establish handler for timer signal */
printf("Establishing handler for signal %d\n", SIG);
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = hndlr.handler;
sigemptyset(&sa.sa_mask);
if (sigaction(SIG, &sa, NULL) == -1)
errExit("sigaction");
/* Block timer signal temporarily */
printf("Blocking signal %d\n", SIG);
sigemptyset(&mask);
sigaddset(&mask, SIG);
if (sigprocmask(SIG_SETMASK, &mask, NULL) == -1)
errExit("sigprocmask");
/* Create the timer */
sev.sigev_notify = SIGEV_SIGNAL;
sev.sigev_signo = SIG;
sev.sigev_value.sival_ptr = &timerid;
if (timer_create(CLOCKID, &sev, &timerid) == -1)
errExit("timer_create");
printf("timer ID is 0x%lx\n", (long) timerid);
/* Start the timer */
freq_nanosecs = atoll(argv[2]);
its.it_value.tv_sec = freq_nanosecs / 1000000000;
its.it_value.tv_nsec = freq_nanosecs % 1000000000;
its.it_interval.tv_sec = its.it_value.tv_sec;
its.it_interval.tv_nsec = its.it_value.tv_nsec;
if (timer_settime(timerid, 0, &its, NULL) == -1)
errExit("timer_settime");
/* Sleep for a while; meanwhile, the timer may expire
multiple times */
printf("Sleeping for %d seconds\n", atoi(argv[1]));
sleep(atoi(argv[1]));
/* Unlock the timer signal, so that timer notification
can be delivered */
printf("Unblocking signal %d\n", SIG);
if (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1)
errExit("sigprocmask");
exit(EXIT_SUCCESS);
}
Кто нибудь может подсказать что мне делать?
