struct db open_db(const char *dir)
{
struct db db;
db.w = open_logger(path(dir, "log"));
db.r = open_reader(path(dir, "log"));
db.mt = open_mtree(path(dir, "mtree"));
db.bag = new_bag(BAG_SIZE);
return db;
}
int main(int argc, char **argv) {
struct sigaction sigact;
init_pagefile(); // init page file
open_logger(); // open logfile
/* Create shared memory and init vmem structure */
vmem_init();
TEST_AND_EXIT_ERRNO(!vmem, "Error initialising vmem");
PRINT_DEBUG((stderr, "vmem successfully created\n"));
// scan parameter
vmem->adm.program_name = argv[0];
vmem->adm.page_rep_algo = VMEM_ALGO_AGING;
scan_params(argc, argv);
/* Setup signal handler */
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
TEST_AND_EXIT_ERRNO(sigaction(SIGUSR1, &sigact, NULL) == -1,
"Error installing signal handler for USR1");
PRINT_DEBUG((stderr, "USR1 handler successfully installed\n"));
TEST_AND_EXIT_ERRNO(sigaction(SIGUSR2, &sigact, NULL) == -1,
"Error installing signal handler for USR2");
PRINT_DEBUG((stderr, "USR2 handler successfully installed\n"));
TEST_AND_EXIT_ERRNO(sigaction(SIGINT, &sigact, NULL) == -1,
"Error installing signal handler for INT");
PRINT_DEBUG((stderr, "INT handler successfully installed\n"));
/* Signal processing loop */
while (1) {
signal_number = 0;
pause();
if (signal_number == SIGUSR1) { /* Page fault */
PRINT_DEBUG((stderr, "Processed SIGUSR1\n"));
signal_number = 0;
} else if (signal_number == SIGUSR2) { /* PT dump */
PRINT_DEBUG((stderr, "Processed SIGUSR2\n"));
signal_number = 0;
} else if (signal_number == SIGINT) {
PRINT_DEBUG((stderr, "Processed SIGINT\n"));
}
}
return 0;
}
