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Diffstat (limited to 'doc/examples/timed/slow-poll.c')
-rw-r--r-- | doc/examples/timed/slow-poll.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/doc/examples/timed/slow-poll.c b/doc/examples/timed/slow-poll.c new file mode 100644 index 0000000..5076ef6 --- /dev/null +++ b/doc/examples/timed/slow-poll.c @@ -0,0 +1,46 @@ +#include <bus.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> + +#define t(stmt) if (stmt) goto fail + + + +int +main() +{ + bus_t bus; + const char *message; + long long tick = 0; + struct timespec timeout; + t(bus_open(&bus, "/tmp/example-bus", BUS_RDONLY)); + t(bus_poll_start(&bus)); + for (;;) { + t(clock_gettime(CLOCK_MONOTONIC, &timeout)); + timeout.tv_sec += 1; + message = bus_poll_timed(&bus, &timeout, CLOCK_MONOTONIC); + if (message == NULL) { + t(errno != EAGAIN); + printf("waiting... %lli\n", ++tick); + continue; + } + tick = 0; + message = strchr(message, ' ') + 1; + if (!strcmp(message, "stop")) + break; + printf("\033[01m%s\033[21m\n", message); + sleep(1); + } + t(bus_poll_stop(&bus)); + bus_close(&bus); + return 0; + +fail: + perror("poll"); + bus_poll_stop(&bus); + bus_close(&bus); + return 1; +} + |