diff options
Diffstat (limited to 'TAO/orbsvcs/orbsvcs/Concurrency/CC_Lock.cpp')
| -rw-r--r-- | TAO/orbsvcs/orbsvcs/Concurrency/CC_Lock.cpp | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/TAO/orbsvcs/orbsvcs/Concurrency/CC_Lock.cpp b/TAO/orbsvcs/orbsvcs/Concurrency/CC_Lock.cpp deleted file mode 100644 index 55b51bd98fd..00000000000 --- a/TAO/orbsvcs/orbsvcs/Concurrency/CC_Lock.cpp +++ /dev/null @@ -1,243 +0,0 @@ -// $Id$ - -// ============================================================================ -// -// = LIBRARY -// TAO/orbsvcs/Concurrency_Service -// -// = FILENAME -// CC_Lock.cpp -// -// = DESCRIPTION -// This class implements a lock used by the lock set from the -// concurrency control service. -// -// = AUTHORS -// Torben Worm <tworm@cs.wustl.edu> -// -// ============================================================================ - -#include "CC_Lock.h" -#include "tao/corba.h" - -ACE_RCSID(Concurrency, CC_Lock, "$Id$") - -CC_Lock::CC_Lock (void) - : mode_ (CosConcurrencyControl::intention_read), - lock_held_ (0) -{ -} - -CC_Lock::CC_Lock (CosConcurrencyControl::lock_mode mode) - : mode_ (mode), - lock_held_ (0) -{ -} - -CC_Lock::~CC_Lock (void) -{ -} - -void -CC_Lock::lock (CORBA::Environment &) -{ - ACE_DEBUG ((LM_DEBUG, - "CC_Lock::lock\n")); - lock_held_++; -} - -CORBA::Boolean -CC_Lock::try_lock (CORBA::Environment &ACE_TRY_ENV) -{ - ACE_UNUSED_ARG (ACE_TRY_ENV); - - ACE_DEBUG ((LM_DEBUG, - "CC_Lock::try_lock. ")); - - lock_held_++; - - ACE_DEBUG ((LM_DEBUG, - "lock_held_: %i, ", - lock_held_)); - - int success = 0;//semaphore_.tryacquire (); - - ACE_DEBUG ((LM_DEBUG, - "success: %i\n", success)); - - if (success == -1) - { - if (errno == EBUSY) - { - lock_held_--; - return 0; - } - else - ACE_THROW_RETURN (CORBA::INTERNAL (), - 0); - } - ACE_DEBUG ((LM_DEBUG, - "lock_held_: %i, ", - lock_held_)); - - return 1; -} - -void -CC_Lock::unlock (CORBA::Environment &ACE_TRY_ENV) -{ - ACE_DEBUG ((LM_DEBUG, - "CC_Lock::unlock\n")); - if (lock_held_ == 0) - ACE_THROW (CosConcurrencyControl::LockNotHeld ()); - - int success = 0; //semaphore_.release (); - - if (success == -1) - ACE_THROW (CORBA::INTERNAL ()); - - lock_held_--; - - ACE_DEBUG ((LM_DEBUG, - "lock_held_: %i, ", - lock_held_)); -} - -void -CC_Lock::change_mode (CosConcurrencyControl::lock_mode new_mode, - CORBA::Environment &ACE_TRY_ENV) -{ - ACE_UNUSED_ARG (ACE_TRY_ENV); - ACE_DEBUG ((LM_DEBUG, - "CC_Lock::change_mode\n")); - - // @@TAO Hmmm, we cannot really do anything at present since there - // is only one lock per lock set and that lock is essentially a - // write lock - - if (lock_held_ == 0) - ACE_THROW (CosConcurrencyControl::LockNotHeld ()); - - this->mode_ = new_mode; -} - -void -CC_Lock::set_mode (CosConcurrencyControl::lock_mode mode) -{ - this->mode_ = mode; -} - -CORBA::Boolean -CC_Lock::Compatible (const CC_Lock &other) -{ - return this->Compatible (other.mode_); -} - -CORBA::Boolean -CC_Lock::Compatible (CosConcurrencyControl::lock_mode mode) -{ - return compatible_[this->mode_][mode]; -} - -CosConcurrencyControl::lock_mode -CC_Lock::GetMode (void) -{ - return mode_; -} - -int -CC_Lock::GetLocksHeld (void) -{ - return this->lock_held_; -} - -void -CC_Lock::DecLocksHeld (void) -{ - this->lock_held_--; -} - -void -CC_Lock::dump (void) -{ - ACE_DEBUG ((LM_DEBUG, - "mode_ %i, lock_held_: %i\n", - mode_, - lock_held_)); -} - -// The check of compatibility is a hard coded table statically -// allocated. This table must be changed if the number of lock modes -// or their compatibility are changed. The table here looks different -// from the table in the spec, this is due to the different ordering -// of the lock modes in the table and in the enum in the IDL. The -// first index in the array is the mode held by this lock and the -// second index is the requested mode. -// Requested mode -// Held mode R W U IR IW -// R X X -// W X X X X X -// U X X X X = conflict -// IR X -// IW X X X -// -CORBA::Boolean CC_Lock::compatible_[NUMBER_OF_LOCK_MODES][NUMBER_OF_LOCK_MODES] ={ - {1, 0, 1, 1, 0}, - {0, 0, 0, 0, 0}, - {1, 0, 0, 1, 0}, - {1, 0, 1, 1, 1}, - {0, 0, 0, 1, 1}}; - -// CC_LockModeterator - -CC_LockModeIterator::CC_LockModeIterator (void) - : current_ (CosConcurrencyControl::intention_read) -{ -} - -CC_LockModeIterator::~CC_LockModeIterator (void) -{ - // Do nothing -} -void CC_LockModeIterator::First (void) -{ - current_ = CosConcurrencyControl::intention_read; -} - -void CC_LockModeIterator::Next (CORBA::Environment &ACE_TRY_ENV) -{ - switch (current_) - { - case CosConcurrencyControl::intention_read: - current_ = CosConcurrencyControl::read; - break; - case CosConcurrencyControl::read: - current_ = CosConcurrencyControl::upgrade; - break; - case CosConcurrencyControl::upgrade: - current_ = CosConcurrencyControl::intention_write; - break; - case CosConcurrencyControl::intention_write: - current_ = CosConcurrencyControl::write; - break; - case CosConcurrencyControl::write: - ACE_THROW (CORBA::INTERNAL ()); - default: - ACE_THROW (CORBA::INTERNAL ()); - } -} - -CORBA::Boolean -CC_LockModeIterator::IsDone (void) -{ - if (current_==CosConcurrencyControl::write) - return 1; - else - return 0; -} - -CosConcurrencyControl::lock_mode -CC_LockModeIterator::GetLockMode (void) -{ - return current_; -} |