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// -*- C++ -*-
//
// $Id$
#include "ace/Global_Macros.h"
#include "ace/OS_NS_Thread.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
#if defined (ACE_HAS_WCHAR)
// Semaphores don't offer wide-char names, so convert the name and forward
// to the narrow-char open().
ACE_INLINE int
ACE_SV_Semaphore_Simple::open (const wchar_t *name,
short flags,
int initial_value,
u_short nsems,
mode_t perms)
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::open (wchar_t)");
return this->open (ACE_Wide_To_Ascii (name).char_rep (),
flags,
initial_value,
nsems,
perms);
}
#endif /* ACE_HAS_WCHAR */
ACE_INLINE int
ACE_SV_Semaphore_Simple::control (int cmd,
semun arg,
u_short n) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::control");
return this->internal_id_ == -1 ?
-1 : ACE_OS::semctl (this->internal_id_, n, cmd, arg);
}
// Close a ACE_SV_Semaphore, marking it as invalid for subsequent
// operations...
ACE_INLINE int
ACE_SV_Semaphore_Simple::close (void)
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::close");
return this->init ();
}
// General ACE_SV_Semaphore operation on an array of SV_Semaphores.
ACE_INLINE int
ACE_SV_Semaphore_Simple::op (sembuf op_vec[], u_short n) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::op");
return this->internal_id_ == -1
? -1 : ACE_OS::semop (this->internal_id_, op_vec, n);
}
// Wait until a ACE_SV_Semaphore's value is greater than 0, the
// decrement it by 1 and return. Dijkstra's P operation, Tannenbaums
// DOWN operation.
ACE_INLINE int
ACE_SV_Semaphore_Simple::acquire (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::acquire");
return this->op (-1, n, flags);
}
ACE_INLINE int
ACE_SV_Semaphore_Simple::acquire_read (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::acquire_read");
return this->acquire (n, flags);
}
ACE_INLINE int
ACE_SV_Semaphore_Simple::acquire_write (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::acquire_write");
return this->acquire (n, flags);
}
// Non-blocking version of acquire().
ACE_INLINE int
ACE_SV_Semaphore_Simple::tryacquire (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::tryacquire");
return this->op (-1, n, flags | IPC_NOWAIT);
}
// Non-blocking version of acquire().
ACE_INLINE int
ACE_SV_Semaphore_Simple::tryacquire_read (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::tryacquire_read");
return this->tryacquire (n, flags);
}
// Non-blocking version of acquire().
ACE_INLINE int
ACE_SV_Semaphore_Simple::tryacquire_write (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::tryacquire_write");
return this->tryacquire (n, flags);
}
// Increment ACE_SV_Semaphore by one. Dijkstra's V operation,
// Tannenbaums UP operation.
ACE_INLINE int
ACE_SV_Semaphore_Simple::release (u_short n, short flags) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::release");
return this->op (1, n, flags);
}
ACE_INLINE int
ACE_SV_Semaphore_Simple::get_id (void) const
{
ACE_TRACE ("ACE_SV_Semaphore_Simple::get_id");
return this->internal_id_;
}
ACE_END_VERSIONED_NAMESPACE_DECL
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