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118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
// -*- C++ -*-
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//
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// $Id: SV_Shared_Memory.inl 80826 2008-03-04 14:51:23Z wotte $
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#include "ace/OS_NS_sys_shm.h"
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#include "ace/Global_Macros.h"
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#include "ace/OS_NS_errno.h"
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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ACE_INLINE size_t
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ACE_SV_Shared_Memory::round_up (size_t len)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::round_up");
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return (len + ACE_SV_Shared_Memory::ALIGN_WORDB - 1) & ~(ACE_SV_Shared_Memory::ALIGN_WORDB - 1);
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}
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// Creates a shared memory segment of SIZE bytes. Does *not* attach
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// this memory segment...
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ACE_INLINE int
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ACE_SV_Shared_Memory::open (key_t external_id, size_t sz, int create, int perms)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::open");
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#if defined (ACE_WIN32)
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ACE_UNUSED_ARG(perms);
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ACE_UNUSED_ARG(create);
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ACE_UNUSED_ARG(sz);
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ACE_UNUSED_ARG(external_id);
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ACE_NOTSUP_RETURN (-1);
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#else
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this->segment_ptr_ = 0;
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this->size_ = sz;
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this->internal_id_ = ACE_OS::shmget (external_id, sz, create | perms);
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return this->internal_id_ == -1 ? -1 : 0;
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#endif /* ACE_WIN32 */
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}
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// Attachs to the shared memory segment.
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ACE_INLINE int
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ACE_SV_Shared_Memory::attach (void *virtual_addr, int flags)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::attach");
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#if defined (ACE_WIN32)
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ACE_UNUSED_ARG(flags);
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ACE_UNUSED_ARG(virtual_addr);
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ACE_NOTSUP_RETURN (-1);
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#else
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this->segment_ptr_ = ACE_OS::shmat (this->internal_id_, virtual_addr, flags);
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return this->segment_ptr_ == (void *) -1 ? -1 : 0;
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#endif /* ACE_WIN32 */
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}
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// Interface to the underlying shared memory control function.
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ACE_INLINE int
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ACE_SV_Shared_Memory::control (int cmd, void *buf)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::control");
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#if defined (ACE_WIN32)
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ACE_UNUSED_ARG(cmd);
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ACE_UNUSED_ARG(buf);
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ACE_NOTSUP_RETURN (-1);
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#else
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return ACE_OS::shmctl (this->internal_id_, cmd, (struct shmid_ds *) buf);
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#endif /* ACE_WIN32 */
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}
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// The overall size of the segment.
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ACE_INLINE size_t
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ACE_SV_Shared_Memory::get_segment_size (void) const
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::get_segment_size");
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return this->size_;
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}
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// Removes the shared memory segment.
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ACE_INLINE int
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ACE_SV_Shared_Memory::remove (void)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::remove");
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#if defined (ACE_WIN32)
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ACE_NOTSUP_RETURN (-1);
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#else
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return ACE_OS::shmctl (this->internal_id_, IPC_RMID, 0);
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#endif /* ACE_WIN32 */
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}
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// Detach the current binding between this->segment_ptr and the shared
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// memory segment.
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ACE_INLINE int
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ACE_SV_Shared_Memory::detach (void)
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::detach");
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return ACE_OS::shmdt (this->segment_ptr_);
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}
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ACE_INLINE void *
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ACE_SV_Shared_Memory::get_segment_ptr (void) const
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::get_segment_ptr");
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return this->segment_ptr_;
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}
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ACE_INLINE ACE_HANDLE
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ACE_SV_Shared_Memory::get_id (void) const
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{
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ACE_TRACE ("ACE_SV_Shared_Memory::get_id");
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return this->internal_id_;
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}
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ACE_END_VERSIONED_NAMESPACE_DECL
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