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
  16 namespace Mem
  17 {
  18
  19 /// Shared memory page identifier, address, or handler
  20 class PageId
  21 {
  22 public:
  23     PageId(): pool(0), number(0), purpose(maxPurpose) {}
  24
  25     operator bool() const { return pool && number; }
  26
  27     uint32_t pool; ///< page pool ID within Squid
  28     // uint32_t segment; ///< memory segment ID within the pool; unused for now
  29     uint32_t number; ///< page number within the segment
  30
  31     enum Purpose { cachePage, ioPage, maxPurpose };
  32     Purpose purpose; ///< page purpose
  33 };
  34
  35 /// writes page address (e.g., "sh_page5.3"), for debugging
  36 std::ostream &operator <<(std::ostream &os, const PageId &page);
  37
  38 } // namespace Mem
  39
  40 } // namespace Ipc
  41
  42 #endif // SQUID_IPC_MEM_PAGE_H