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sc::ActiveMsgMemoryGrp Class Reference The ActiveMsgMemoryGrp abstract class specializes the MsgMemoryGrp class. More... #include <memamsg.h> Inheritance diagram for sc::ActiveMsgMemoryGrp: [legend]Collaboration diagram for sc::ActiveMsgMemoryGrp: [legend]List of all members. Public Methods   ActiveMsgMemoryGrp (const Ref< MessageGrp > &msg)   ActiveMsgMemoryGrp (const Ref< KeyVal > &)   ~ActiveMsgMemoryGrp () void  set_localsize (size_t)   Set the size of locally held memory. More... void *  localdata ()   Returns a pointer to the local data. void *  obtain_writeonly (distsize_t offset, int size)   This gives write access to the memory location. No locking is done. void *  obtain_readwrite (distsize_t offset, int size)   Only one thread can have an unreleased obtain_readwrite at a time. More... void *  obtain_readonly (distsize_t offset, int size)   This gives read access to the memory location. No locking is done. void  release_readonly (void *data, distsize_t offset, int size)   This is called when read access is no longer needed. void  release_writeonly (void *data, distsize_t offset, int size)   This is called when write access is no longer needed. void  release_readwrite (void *data, distsize_t offset, int size)   This is called when read/write access is no longer needed. More... void  sum_reduction (double *data, distsize_t doffset, int dsize) void  sum_reduction_on_node (double *data, size_t doffset, int dsize, int node=-1) void  print (std::ostream &o=ExEnv::out0()) const   Prints out information about the object. Protected Methods virtual void  retrieve_data (void *, int node, int offset, int size, int lock)=0 virtual void  replace_data (void *, int node, int offset, int size, int unlock)=0 virtual void  sum_data (double *data, int node, int doffset, int dsize)=0 Protected Attributes char *  data_ Detailed Description The ActiveMsgMemoryGrp abstract class specializes the MsgMemoryGrp class. It uses active messages to implement global shared memory. Member Function Documentation void* sc::ActiveMsgMemoryGrp::obtain_readwrite (  distsize_t    offset, int    size )  [virtual]   Only one thread can have an unreleased obtain_readwrite at a time. The actual memory region locked can be larger than that requested. If the memory region is already locked this will block. For this reason, data should be held as read/write for as short a time as possible. Implements sc::MemoryGrp. void sc::ActiveMsgMemoryGrp::release_readwrite (  void *    data, distsize_t    offset, int    size )  [virtual]   This is called when read/write access is no longer needed. The memory will be unlocked. Implements sc::MemoryGrp. void sc::ActiveMsgMemoryGrp::set_localsize (  size_t    )  [virtual]   Set the size of locally held memory. When memory is accessed using a global offset counting starts at node 0 and proceeds up to node n() - 1. Reimplemented from sc::MsgMemoryGrp. The documentation for this class was generated from the following file: memamsg.h