Coin / src / threads / condvar.cpp

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#include <Inventor/C/threads/condvar.h>

#include <stdlib.h>
#include <assert.h>
#include <errno.h>

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif /* HAVE_SYS_TIME_H */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */

#include <Inventor/C/threads/mutex.h>
#include <Inventor/C/errors/debugerror.h>

#include "threads/condvarp.h"

/* ********************************************************************** */
#ifdef USE_PTHREAD
#include "condvar_pthread.icc"
#endif /* USE_PTHREAD */

#ifdef USE_W32THREAD
#include "condvar_win32.icc"
#endif /* USE_W32THREAD */

/*
  \internal
*/

void
cc_condvar_struct_init(cc_condvar * condvar_struct)
{
  int ok;
  ok = internal_condvar_struct_init(condvar_struct);
  assert(ok == CC_OK);
}

/*
  \internal
*/
void
cc_condvar_struct_clean(cc_condvar * condvar_struct)
{
  int ok;
  assert(condvar_struct != NULL);
  ok = internal_condvar_struct_clean(condvar_struct);
  assert(ok == CC_OK);
}

/* ********************************************************************** */

/*
*/

cc_condvar *
cc_condvar_construct(void)
{
  cc_condvar * condvar;
  condvar = (cc_condvar *) malloc(sizeof(cc_condvar));
  assert(condvar != NULL);
  cc_condvar_struct_init(condvar);
  return condvar;
}

/*
*/

void
cc_condvar_destruct(cc_condvar * condvar)
{
  assert((condvar != NULL));
  cc_condvar_struct_clean(condvar);
  free(condvar);
}

/*
*/

int
cc_condvar_wait(cc_condvar * condvar, cc_mutex * mutex)
{
  int ok;
  assert(condvar != NULL);
  ok = internal_condvar_wait(condvar, mutex);
  assert(ok == CC_OK);
  return ok;
}

/*
*/

int
cc_condvar_timed_wait(cc_condvar * condvar,
                      cc_mutex * mutex,
                      cc_time period)
{
  int ret;
  assert(condvar != NULL);
  ret = internal_condvar_timed_wait(condvar, mutex, period);
  assert(ret == CC_OK || ret == CC_TIMEOUT);
  return ret;
}

/*
*/

void
cc_condvar_wake_one(cc_condvar * condvar)
{
  int ok;
  assert(condvar != NULL);
  ok = internal_condvar_wake_one(condvar);
  assert(ok == CC_OK);
}

/*
*/
void
cc_condvar_wake_all(cc_condvar * condvar)
{
  int ok;
  assert(condvar != NULL);

  ok = internal_condvar_wake_all(condvar);
  assert(ok == CC_OK);
}

/* ********************************************************************** */

/*!
  \class SbCondVar Inventor/threads/SbCondVar.h
  \brief A class for synchronizing access to global variables.
  \ingroup threads

  Condition variables are used to protect global variables in an
  environment where multiple threads are running concurrently.
*/

/*!
  \fn SbCondVar::SbCondVar(void)

  Constructor.
*/

/*!
  \fn SbCondVar::~SbCondVar(void)

  Destructor.
*/

/*!
  \fn SbBool SbCondVar::wait(SbMutex & mutex)

  This method blocks the calling thread until another thread calls
  wakeOne() or wakeAll() on the SbCondVar object.
*/

/*!
  \fn SbBool SbCondVar::timedWait(SbMutex & mutex, SbTime period)

  This method blocks the calling thread until another thread calls
  wakeOne() or wakeAll() on the object, but if this does not happen
  within \c period, the thread is woken again anyways.

  \c TRUE is returned when the thread wakes because either wakeOne()
  or wakeAll() was called, \c FALSE is returned if the wait times out.
*/

/*!
  \fn void SbCondVar::wakeOne(void)

  This method wakes up one of the threads waiting on this SbCondVar.
*/

/*!
  \fn void SbCondVar::wakeAll(void)

  This method wakes up all the threads waiting on this SbCondVar.
*/

/* ********************************************************************** */
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