bool stat_manager::start(int bucket_number, const char *file_dir)
{
// open file
snprintf(file_name, PATH_MAX_LENGTH, "%s/tair_kdb_%06d.stat", file_dir, bucket_number);
fd =::open(file_name, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
if(fd < 0) {
log_error("open file [%s] failed: %s", file_name, strerror(errno));
return false;
}
// check the file is new or not
if(get_size() == 0) {
if(!initial_stat_file()) {
return false;
}
}
// mmap
int flags = PROT_READ | PROT_WRITE;
int size = KDBSTATINFO_SIZE;
if(!ensure_file_size(size)) {
log_error("ensure file size failed");
return false;
}
void* data = mmap(0, size, flags, MAP_SHARED, fd, 0);
if(data == MAP_FAILED) {
log_error("map file failed: %s", strerror(errno));
return false;
}
log_info("mmap file successed, maped size is: [%d]", size);
stat_info = (kdb_stat_info *)data;
return true;
}
DLL_VARIABLE void mj_rollingfile_write(mj_rollingfile_t* rf, const char* data, size_t n)
{
if(0 == rf)
return;
ensure_file_size(rf);
if(0 == rf->out)
return;
fwrite(data, sizeof(char), n, rf->out);
rf->current_size += n;
}
int WOShmem_init(const char *file, size_t memsize)
{
int error = 0;
char *errMsg = NULL;
/* open up the file */
WOShmem_fd = open(file, O_RDWR|O_CREAT, 0600);
if (WOShmem_fd > 0)
{
#ifdef APACHE
/* unlink the file so when Apache exits the file is removed */
/* The mmap should still be in effect */
unlink(file);
#endif
WOShmem_size = ensure_file_size(WOShmem_fd, memsize);
if (WOShmem_size != -1)
{
WOShmem_base_address = (void *)mmap(0, WOShmem_size, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED|MAP_INHERIT, WOShmem_fd, 0);
if (WOShmem_base_address == MAP_FAILED)
{
errMsg = WA_errorDescription(WA_error());
WOLog(WO_ERR, "WOShmem_init(): couldn't map file: %s", errMsg);
error = 1;
}
} else
error = 1;
} else {
errMsg = WA_errorDescription(WA_error());
WOLog(WO_ERR,"WOShmem_init(): Couldn't open %s: %s", file, errMsg);
error = 1;
}
if (error)
WOShmem_fd = -1;
if (errMsg)
WA_freeErrorDescription(errMsg);
WOShmem_mutex = WA_createLock("WOShmem_lock");
return WOShmem_fd == -1;
}
bool map_file(bool write = false) {
int flags = PROT_READ;
if(write)
flags |= PROT_WRITE;
if(fd < 0)
return false;
if(0 == max_size)
return false;
if(max_size <= (1024 * MB_SIZE)) {
size = max_size;
}
else {
size = 1 * MB_SIZE;
}
if(!ensure_file_size(size)) {
log_error("ensure file size failed");
return false;
}
data = mmap(0, size, flags, MAP_SHARED, fd, 0);
if(data == MAP_FAILED) {
log_error("map file failed: %s", strerror(errno));
fd = -1;
data = NULL;
size = 0;
return false;
}
log_info("mmap file successed, maped size is: [%d]", size);
return true;
}
bool remap()
{
if(fd < 0 || data == NULL) {
log_error("mremap not mapped yet");
return false;
}
if(size == max_size) {
log_info("already mapped max size, currSize: [%u], maxSize: [%u]",
size, max_size);
return false;
}
size_t new_size = size * 2;
if(new_size > max_size)
new_size = max_size;
if(!ensure_file_size(new_size)) {
log_error("ensure file size failed in mremap");
return false;
}
//void *newMapData = mremap(m_data, m_size, newSize, MREMAP_MAYMOVE);
void *new_map_data = mremap(data, size, new_size, 0);
if(new_map_data == MAP_FAILED) {
log_error("mremap file failed: %s", strerror(errno));
return false;
}
else {
log_info("remap success, oldSize: [%u], newSize: [%u]", size,
new_size);
}
log_info("mremap successed, new size: [%d]", new_size);
data = new_map_data;
size = new_size;
return true;
}