ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2025-06-19 23:53:55 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Check ownership when freeing RAM dataspaces

Browse Source
This commit is contained in:
Martin Stein
2012-04-20 10:59:41 +02:00
committed by Norman Feske
parent d6f956e37e
commit 3236395e6a
4 changed files with 47 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
base-linux/src/core/include/dataspace_component.h
View File

@ -27,6 +27,11 @@
namespace Genode {
/**
* Deriving classes can own a dataspace to implement conditional behavior
*/
class Dataspace_owner { };
class Dataspace_component : public Rpc_object<Linux_dataspace>
{
private:
@ -36,18 +41,25 @@ namespace Genode {
Filename _fname; /* filename for mmap */
bool _writable; /* false if read-only */
/* Holds the dataspace owner if a distinction between owner and
* others is necessary on the dataspace, otherwise it is 0 */
Dataspace_owner * _owner;
public:
/**
* Constructor
*/
Dataspace_component(size_t size, addr_t addr, bool writable)
: _size(size), _addr(addr), _writable(writable) { }
Dataspace_component(size_t size, addr_t addr, bool writable,
Dataspace_owner * owner = 0)
: _size(size), _addr(addr), _writable(writable),
_owner(owner) { }
/**
* Default constructor returns invalid dataspace
*/
Dataspace_component() : _size(0), _addr(0), _writable(false) { }
Dataspace_component() : _size(0), _addr(0), _writable(false),
_owner(0) { }
/**
* This constructor is only provided for compatibility
@ -55,8 +67,8 @@ namespace Genode {
*/
Dataspace_component(size_t size, addr_t core_local_addr,
addr_t phys_addr, bool write_combined,
bool writable)
: _size(size), _addr(phys_addr)
bool writable, Dataspace_owner * _owner = 0)
: _size(size), _addr(phys_addr), _owner(_owner)
{
PWRN("Should only be used for IOMEM and not within Linux.");
}
@ -70,6 +82,10 @@ namespace Genode {
*/
void fname(const char *fname) { strncpy(_fname.buf, fname, sizeof(_fname.buf)); }
/**
* Check if dataspace is owned by a specified object
*/
bool owner(Dataspace_owner * const o) const { return _owner == o; }
/*************************
** Dataspace interface **