bool File::open(const String& filename_,int flag_)
{
String filename=fn_encode(filename_);
int fd=::open(filename.c_str(),shm_fileflag(flag_),0777);
if(fd<0)
{
if((flag_&FLAG_FILE_CR)!=0)
{
fd=::open(filename.c_str(),shm_fileflag(flag_)|O_CREAT,0777);
}
if(fd<0)
{
flags.add(FLAG_WRITER_FAILBIT|FLAG_READER_FAILBIT);
System::CheckError("File::Open Error");
return false;
}
}
flags.clr(0);
impl.reset(fd);
if(flag_&FLAG_FILE_APPEND)
{
seek(0,SEEKTYPE_END);
}
return true;
}
static bool shm_create(impl_type& impl,const String& name_,size_t size_,int flag_)
{
KO_Handle<KO_Policy_handle> hfd;
int fd=-1;
int map_type=MAP_SHARED;
if(!name_.empty())
{
int oflag=shm_fileflag(flag_);
if(flag_&FileAccess::FLAG_CR)
{
oflag|=O_CREAT;
}
fd=shm_open(name_.c_str(),oflag,0777);
if(fd<0)
{
System::CheckError("shm_open");
return false;
}
hfd.reset(fd);
if(flag_&FileAccess::FLAG_CR)
{
ftruncate(fd,size_);
}
else
{
struct stat statbuf;
if(fstat(fd,&statbuf)<0)
{
return false;
}
if((size_t)statbuf.st_size!=size_)
{
return false;
}
}
}
else
{
map_type=MAP_PRIVATE|MAP_ANONYMOUS;
}
void* _mem=mmap(0,size_,FileAccess::makeflag(flag_,PROT_READ,PROT_WRITE),map_type,fd,0);
if(_mem==MAP_FAILED)
{
System::CheckError("mmap");
return false;
}
impl.m_pAddr=(char*)_mem;
impl.m_nSize=size_;
impl.m_sName=name_;
return true;
}
static bool shm_openfile(impl_type& impl,const String& name_,size_t size_,int flag_)
{
KO_Handle<KO_Policy_handle> hfd;
int fd=::open(name_.c_str(),shm_fileflag(flag_),0777);
if(fd<0)
{
if((flag_&FileAccess::FLAG_CR)==0||size_==0)
{
return false;
}
fd=::open(name_.c_str(),shm_fileflag(flag_)|O_CREAT,0777);
if(fd<0)
{
System::CheckError("open");
return false;
}
}
hfd.reset(fd);
if(size_!=0)
{
ftruncate(fd,size_);
}
struct stat statbuf;
if(fstat(fd,&statbuf)<0)
{
return false;
}
size_=statbuf.st_size;
void* _mem=mmap(0,size_,FileAccess::makeflag(flag_,PROT_READ,PROT_WRITE),MAP_SHARED,fd,0);
if(_mem==MAP_FAILED)
{
System::CheckError("mmap");
return false;
}
impl.m_pAddr=(char*)_mem;
impl.m_nSize=size_;
impl.m_sName=name_;
return true;
}
