src/ipc/mem/Page.h

   1 /*
   2  * $Id$
   3  *
   4  */
   5
   6 #ifndef SQUID_IPC_MEM_PAGE_H
   7 #define SQUID_IPC_MEM_PAGE_H
   8
   9 #if HAVE_IOSFWD
  10 #include <iosfwd>
  11 #endif
  12
  13 namespace Ipc {
  14
  15 namespace Mem {
  16
  17 /// Shared memory page identifier, address, or handler
  18 class PageId {
  19 public:
  20     PageId(): pool(0), number(0), purpose(maxPurpose) {}
  21
  22     operator bool() const { return pool && number; }
  23
  24     uint32_t pool; ///< page pool ID within Squid
  25     // uint32_t segment; ///< memory segment ID within the pool; unused for now
  26     uint32_t number; ///< page number within the segment
  27
  28     enum Purpose { cachePage, ioPage, maxPurpose };
  29     Purpose purpose; ///< page purpose
  30 };
  31
  32 /// writes page address (e.g., "sh_page5.3"), for debugging
  33 std::ostream &operator <<(std::ostream &os, const PageId &page);
  34
  35 } // namespace Mem
  36
  37 } // namespace Ipc
  38
  39 #endif // SQUID_IPC_MEM_PAGE_H