int shm_mem_init(int force_alloc)
{
int ret;
long sz;
long* p;
long* end;
ret=shm_getmem();
if (ret<0) return ret;
if (force_alloc){
sz=sysconf(_SC_PAGESIZE);
DBG("shm_mem_init: %ld bytes/page\n", sz);
if ((sz<sizeof(*p)) || (_ROUND_LONG(sz)!=sz)){
LOG(L_WARN, "shm_mem_init: invalid page size %ld, using 4096\n",
sz);
sz=4096; /* invalid page size, use 4096 */
}
end=shm_mempool+shm_mem_size-sizeof(*p);
/* touch one word in every page */
for(p=(long*)_ROUND_LONG((long)shm_mempool); p<=end;
p=(long*)((char*)p+sz))
*p=0;
}
return shm_mem_init_mallocs(shm_mempool, shm_mem_size);
}
int shm_mem_init(void)
{
int ret;
ret=shm_getmem();
if (ret<0) return ret;
return shm_mem_init_mallocs(shm_mempool, shm_mem_size);
}
int shm_mem_init(void)
{
int ret;
LM_INFO("allocating SHM block\n");
ret = shm_getmem();
if (ret < 0)
return ret;
return shm_mem_init_mallocs(shm_mempool, shm_mem_size);
}
int shm_getmem(void)
{
#ifdef SHM_MMAP
#ifndef USE_ANON_MMAP
int fd;
#endif
#else
struct shmid_ds shm_info;
#endif
#ifdef SHM_MMAP
if (_shm_core_pool && (_shm_core_pool!=(void*)-1)){
#else
if ((_shm_core_shmid!=-1)||(_shm_core_pool!=(void*)-1)){
#endif
LOG(L_CRIT, "shm already initialized\n");
return -1;
}
#ifdef SHM_MMAP
#ifdef USE_ANON_MMAP
_shm_core_pool=mmap(0, shm_mem_size, PROT_READ|PROT_WRITE,
MAP_ANON|MAP_SHARED, -1 ,0);
#else
fd=open("/dev/zero", O_RDWR);
if (fd==-1){
LOG(L_CRIT, "could not open /dev/zero: %s\n",
strerror(errno));
return -1;
}
_shm_core_pool=mmap(0, shm_mem_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd ,0);
/* close /dev/zero */
close(fd);
#endif /* USE_ANON_MMAP */
#else
_shm_core_shmid=shmget(IPC_PRIVATE, shm_mem_size , 0700);
if (_shm_core_shmid==-1){
LOG(L_CRIT, "could not allocate shared memory"
" segment: %s\n", strerror(errno));
return -1;
}
_shm_core_pool=shmat(_shm_core_shmid, 0, 0);
#endif
if (_shm_core_pool==(void*)-1){
LOG(L_CRIT, "could not attach shared memory"
" segment: %s\n", strerror(errno));
/* destroy segment*/
shm_core_destroy();
return -1;
}
return 0;
}
/**
*
*/
void* shm_core_get_pool(void)
{
int ret;
long sz;
long* p;
long* end;
ret=shm_getmem();
if (ret<0)
return NULL;
if (shm_force_alloc){
sz=sysconf(_SC_PAGESIZE);
DBG("%ld bytes/page\n", sz);
if ((sz<sizeof(*p)) || (_ROUND_LONG(sz)!=sz)){
LOG(L_WARN, "invalid page size %ld, using 4096\n",
sz);
sz=4096; /* invalid page size, use 4096 */
}
end=_shm_core_pool+shm_mem_size-sizeof(*p);
/* touch one word in every page */
for(p=(long*)_ROUND_LONG((long)_shm_core_pool); p<=end;
p=(long*)((char*)p+sz))
*p=0;
}
return _shm_core_pool;
}
