-/* Copyright (c) 2007-2017. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include "smx_private.hpp"
-#include "src/surf/cpu_interface.hpp"
-#include "src/surf/surf_interface.hpp"
-#include <xbt/ex.hpp>
-#include <xbt/log.h>
-#include <xbt/utility.hpp>
-
+#include "src/kernel/activity/ConditionVariableImpl.hpp"
#include "src/kernel/activity/MutexImpl.hpp"
-#include "src/kernel/activity/SynchroRaw.hpp"
+#include "src/kernel/activity/SemaphoreImpl.hpp"
+#include "src/kernel/context/Context.hpp"
+#include "src/simix/smx_synchro_private.hpp"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_synchro, simix, "SIMIX Synchronization (mutex, semaphores and conditions)");
-static void _SIMIX_cond_wait(smx_cond_t cond, smx_mutex_t mutex, double timeout,
- smx_actor_t issuer, smx_simcall_t simcall);
-static void _SIMIX_sem_wait(smx_sem_t sem, double timeout, smx_actor_t issuer,
- smx_simcall_t simcall);
-
/***************************** Raw synchronization *********************************/
-smx_activity_t SIMIX_synchro_wait(sg_host_t smx_host, double timeout)
-{
- XBT_IN("(%p, %f)",smx_host,timeout);
-
- simgrid::kernel::activity::RawImplPtr sync =
- simgrid::kernel::activity::RawImplPtr(new simgrid::kernel::activity::RawImpl());
- sync->sleep = smx_host->pimpl_cpu->sleep(timeout);
- sync->sleep->setData(sync.get());
- XBT_OUT();
- return sync;
-}
-
void SIMIX_synchro_stop_waiting(smx_actor_t process, smx_simcall_t simcall)
{
XBT_IN("(%p, %p)",process,simcall);
break;
case SIMCALL_COND_WAIT:
- simgrid::xbt::intrusive_erase(simcall_cond_wait__get__cond(simcall)->sleeping, *process);
+ simgrid::xbt::intrusive_erase(simcall_cond_wait__get__cond(simcall)->sleeping_, *process);
break;
case SIMCALL_COND_WAIT_TIMEOUT:
- simgrid::xbt::intrusive_erase(simcall_cond_wait_timeout__get__cond(simcall)->sleeping, *process);
+ simgrid::xbt::intrusive_erase(simcall_cond_wait_timeout__get__cond(simcall)->sleeping_, *process);
+ simcall_cond_wait_timeout__set__result(simcall, 1); // signal a timeout
break;
case SIMCALL_SEM_ACQUIRE:
- simgrid::xbt::intrusive_erase(simcall_sem_acquire__get__sem(simcall)->sleeping, *process);
+ simgrid::xbt::intrusive_erase(simcall_sem_acquire__get__sem(simcall)->sleeping_, *process);
break;
case SIMCALL_SEM_ACQUIRE_TIMEOUT:
- simgrid::xbt::intrusive_erase(simcall_sem_acquire_timeout__get__sem(simcall)->sleeping, *process);
+ simgrid::xbt::intrusive_erase(simcall_sem_acquire_timeout__get__sem(simcall)->sleeping_, *process);
+ simcall_sem_acquire_timeout__set__result(simcall, 1); // signal a timeout
break;
default:
}
XBT_OUT();
}
-
-void SIMIX_synchro_finish(smx_activity_t synchro)
-{
- XBT_IN("(%p)", synchro.get());
- smx_simcall_t simcall = synchro->simcalls.front();
- synchro->simcalls.pop_front();
-
- switch (synchro->state) {
-
- case SIMIX_SRC_TIMEOUT:
- SMX_EXCEPTION(simcall->issuer, timeout_error, 0, "Synchro's wait timeout");
- break;
-
- case SIMIX_FAILED:
- simcall->issuer->context->iwannadie = 1;
- break;
-
- default:
- THROW_IMPOSSIBLE;
- break;
- }
-
- SIMIX_synchro_stop_waiting(simcall->issuer, simcall);
- simcall->issuer->waiting_synchro = nullptr;
- SIMIX_simcall_answer(simcall);
- XBT_OUT();
-}
-
-/********************************* Condition **********************************/
-
-/**
- * \brief Initialize a condition.
- *
- * Allocates and creates the data for the condition.
- * It have to be called before the use of the condition.
- * \return A condition
- */
-smx_cond_t SIMIX_cond_init()
-{
- XBT_IN("()");
- smx_cond_t cond = new s_smx_cond_t();
- cond->refcount_ = 1;
- XBT_OUT();
- return cond;
-}
-
-/**
- * \brief Handle a condition waiting simcall without timeouts
- * \param simcall the simcall
- */
-void simcall_HANDLER_cond_wait(smx_simcall_t simcall, smx_cond_t cond, smx_mutex_t mutex)
-{
- XBT_IN("(%p)",simcall);
- smx_actor_t issuer = simcall->issuer;
-
- _SIMIX_cond_wait(cond, mutex, -1, issuer, simcall);
- XBT_OUT();
-}
-
-/**
- * \brief Handle a condition waiting simcall with timeouts
- * \param simcall the simcall
- */
-void simcall_HANDLER_cond_wait_timeout(smx_simcall_t simcall, smx_cond_t cond,
- smx_mutex_t mutex, double timeout)
-{
- XBT_IN("(%p)",simcall);
- smx_actor_t issuer = simcall->issuer;
-
- _SIMIX_cond_wait(cond, mutex, timeout, issuer, simcall);
- XBT_OUT();
-}
-
-
-static void _SIMIX_cond_wait(smx_cond_t cond, smx_mutex_t mutex, double timeout,
- smx_actor_t issuer, smx_simcall_t simcall)
-{
- XBT_IN("(%p, %p, %f, %p,%p)",cond,mutex,timeout,issuer,simcall);
- smx_activity_t synchro = nullptr;
-
- XBT_DEBUG("Wait condition %p", cond);
-
- /* If there is a mutex unlock it */
- /* FIXME: what happens if the issuer is not the owner of the mutex? */
- if (mutex != nullptr) {
- cond->mutex = mutex;
- mutex->unlock(issuer);
- }
-
- synchro = SIMIX_synchro_wait(issuer->host, timeout);
- synchro->simcalls.push_front(simcall);
- issuer->waiting_synchro = synchro;
- cond->sleeping.push_back(*simcall->issuer);
- XBT_OUT();
-}
-
-/**
- * \brief Signalizes a condition.
- *
- * Signalizes a condition and wakes up a sleeping process.
- * If there are no process sleeping, no action is done.
- * \param cond A condition
- */
-void SIMIX_cond_signal(smx_cond_t cond)
-{
- XBT_IN("(%p)",cond);
- XBT_DEBUG("Signal condition %p", cond);
-
- /* If there are processes waiting for the condition choose one and try
- to make it acquire the mutex */
- if (not cond->sleeping.empty()) {
- auto& proc = cond->sleeping.front();
- cond->sleeping.pop_front();
-
- /* Destroy waiter's synchronization */
- proc.waiting_synchro = nullptr;
-
- /* Now transform the cond wait simcall into a mutex lock one */
- smx_simcall_t simcall = &proc.simcall;
- smx_mutex_t mutex;
- if(simcall->call == SIMCALL_COND_WAIT)
- mutex = simcall_cond_wait__get__mutex(simcall);
- else
- mutex = simcall_cond_wait_timeout__get__mutex(simcall);
- simcall->call = SIMCALL_MUTEX_LOCK;
-
- simcall_HANDLER_mutex_lock(simcall, mutex);
- }
- XBT_OUT();
-}
-
-/**
- * \brief Broadcasts a condition.
- *
- * Signal ALL processes waiting on a condition.
- * If there are no process waiting, no action is done.
- * \param cond A condition
- */
-void SIMIX_cond_broadcast(smx_cond_t cond)
-{
- XBT_IN("(%p)",cond);
- XBT_DEBUG("Broadcast condition %p", cond);
-
- /* Signal the condition until nobody is waiting on it */
- while (not cond->sleeping.empty()) {
- SIMIX_cond_signal(cond);
- }
- XBT_OUT();
-}
-
-smx_cond_t SIMIX_cond_ref(smx_cond_t cond)
-{
- if (cond != nullptr)
- intrusive_ptr_add_ref(cond);
- return cond;
-}
-
-void SIMIX_cond_unref(smx_cond_t cond)
-{
- XBT_IN("(%p)",cond);
- XBT_DEBUG("Destroy condition %p", cond);
- if (cond != nullptr) {
- intrusive_ptr_release(cond);
- }
- XBT_OUT();
-}
-
-
-void intrusive_ptr_add_ref(s_smx_cond_t *cond)
-{
- auto previous = cond->refcount_.fetch_add(1);
- xbt_assert(previous != 0);
-}
-
-void intrusive_ptr_release(s_smx_cond_t *cond)
-{
- if (cond->refcount_.fetch_sub(1) == 1) {
- xbt_assert(cond->sleeping.empty(), "Cannot destroy conditional since someone is still using it");
- delete cond;
- }
-}
-
-/******************************** Semaphores **********************************/
-/** @brief Initialize a semaphore */
-smx_sem_t SIMIX_sem_init(unsigned int value)
-{
- XBT_IN("(%u)",value);
- smx_sem_t sem = new s_smx_sem_t;
- sem->value = value;
- XBT_OUT();
- return sem;
-}
-
-/** @brief Destroys a semaphore */
-void SIMIX_sem_destroy(smx_sem_t sem)
-{
- XBT_IN("(%p)",sem);
- XBT_DEBUG("Destroy semaphore %p", sem);
- if (sem != nullptr) {
- xbt_assert(sem->sleeping.empty(), "Cannot destroy semaphore since someone is still using it");
- delete sem;
- }
- XBT_OUT();
-}
-
-/** @brief release the semaphore
- *
- * Unlock a process waiting on the semaphore.
- * If no one was blocked, the semaphore capacity is increased by 1.
- */
-void SIMIX_sem_release(smx_sem_t sem)
-{
- XBT_IN("(%p)",sem);
- XBT_DEBUG("Sem release semaphore %p", sem);
- if (not sem->sleeping.empty()) {
- auto& proc = sem->sleeping.front();
- sem->sleeping.pop_front();
- proc.waiting_synchro = nullptr;
- SIMIX_simcall_answer(&proc.simcall);
- } else {
- sem->value++;
- }
- XBT_OUT();
-}
-
-/** @brief Returns true if acquiring this semaphore would block */
-int SIMIX_sem_would_block(smx_sem_t sem)
-{
- XBT_IN("(%p)",sem);
- XBT_OUT();
- return (sem->value <= 0);
-}
-
-/** @brief Returns the current capacity of the semaphore */
-int SIMIX_sem_get_capacity(smx_sem_t sem)
-{
- XBT_IN("(%p)",sem);
- XBT_OUT();
- return sem->value;
-}
-
-static void _SIMIX_sem_wait(smx_sem_t sem, double timeout, smx_actor_t issuer,
- smx_simcall_t simcall)
-{
- XBT_IN("(%p, %f, %p, %p)",sem,timeout,issuer,simcall);
- smx_activity_t synchro = nullptr;
-
- XBT_DEBUG("Wait semaphore %p (timeout:%f)", sem, timeout);
- if (sem->value <= 0) {
- synchro = SIMIX_synchro_wait(issuer->host, timeout);
- synchro->simcalls.push_front(simcall);
- issuer->waiting_synchro = synchro;
- sem->sleeping.push_back(*issuer);
- } else {
- sem->value--;
- SIMIX_simcall_answer(simcall);
- }
- XBT_OUT();
-}
-
-/**
- * \brief Handles a sem acquire simcall without timeout.
- * \param simcall the simcall
- */
-void simcall_HANDLER_sem_acquire(smx_simcall_t simcall, smx_sem_t sem)
-{
- XBT_IN("(%p)",simcall);
- _SIMIX_sem_wait(sem, -1, simcall->issuer, simcall);
- XBT_OUT();
-}
-
-/**
- * \brief Handles a sem acquire simcall with timeout.
- * \param simcall the simcall
- */
-void simcall_HANDLER_sem_acquire_timeout(smx_simcall_t simcall, smx_sem_t sem, double timeout)
-{
- XBT_IN("(%p)",simcall);
- _SIMIX_sem_wait(sem, timeout, simcall->issuer, simcall);
- XBT_OUT();
-}
