+++ /dev/null
-#define __STDC_FORMAT_MACROS
-#include <inttypes.h>
-
-#include "promise.h"
-#include "execution.h"
-#include "schedule.h"
-#include "action.h"
-#include "threads-model.h"
-
-/**
- * @brief Promise constructor
- * @param execution The execution which is creating this Promise
- * @param read The read which reads from a promised future value
- * @param fv The future value that is promised
- */
-Promise::Promise(const ModelExecution *execution, ModelAction *read, struct future_value fv) :
- execution(execution),
- num_available_threads(0),
- num_was_available_threads(0),
- fv(fv),
- readers(1, read),
- write(NULL)
-{
- add_thread(fv.tid);
- eliminate_thread(read->get_tid());
-}
-
-/**
- * Add a reader that reads from this Promise. Must be added in an order
- * consistent with execution order.
- *
- * @param reader The ModelAction that reads from this promise. Must be a read.
- * @return True if this new reader has invalidated the promise; false otherwise
- */
-bool Promise::add_reader(ModelAction *reader)
-{
- readers.push_back(reader);
- return eliminate_thread(reader->get_tid());
-}
-
-/**
- * Access a reader that read from this Promise. Readers must be inserted in
- * order by execution order, so they can be returned in this order.
- *
- * @param i The index of the reader to return
- * @return The i'th reader of this Promise
- */
-ModelAction * Promise::get_reader(unsigned int i) const
-{
- return i < readers.size() ? readers[i] : NULL;
-}
-
-/**
- * Eliminate a thread which no longer can satisfy this promise. Once all
- * enabled threads have been eliminated, this promise is unresolvable.
- *
- * @param tid The thread ID of the thread to eliminate
- * @return True, if this elimination has invalidated the promise; false
- * otherwise
- */
-bool Promise::eliminate_thread(thread_id_t tid)
-{
- unsigned int id = id_to_int(tid);
- if (!thread_is_available(tid))
- return false;
-
- available_thread[id] = false;
- num_available_threads--;
- return has_failed();
-}
-
-/**
- * Add a thread which may resolve this promise
- *
- * @param tid The thread ID
- */
-void Promise::add_thread(thread_id_t tid)
-{
- unsigned int id = id_to_int(tid);
- if (id >= available_thread.size())
- available_thread.resize(id + 1, false);
- if (!available_thread[id]) {
- available_thread[id] = true;
- num_available_threads++;
- }
- if (id >= was_available_thread.size())
- was_available_thread.resize(id + 1, false);
- if (!was_available_thread[id]) {
- was_available_thread[id] = true;
- num_was_available_threads++;
- }
-}
-
-/**
- * Check if a thread is available for resolving this promise. That is, the
- * thread must have been previously marked for resolving this promise, and it
- * cannot have been eliminated due to synchronization, etc.
- *
- * @param tid Thread ID of the thread to check
- * @return True if the thread is available; false otherwise
- */
-bool Promise::thread_is_available(thread_id_t tid) const
-{
- unsigned int id = id_to_int(tid);
- if (id >= available_thread.size())
- return false;
- return available_thread[id];
-}
-
-bool Promise::thread_was_available(thread_id_t tid) const
-{
- unsigned int id = id_to_int(tid);
- if (id >= was_available_thread.size())
- return false;
- return was_available_thread[id];
-}
-
-/**
- * @brief Get an upper bound on the number of available threads
- *
- * Gets an upper bound on the number of threads in the available threads set,
- * useful for iterating over "thread_is_available()".
- *
- * @return The upper bound
- */
-unsigned int Promise::max_available_thread_idx() const
-{
- return available_thread.size();
-}
-
-/** @brief Print debug info about the Promise */
-void Promise::print() const
-{
- model_print("Promised value %#" PRIx64 ", first read from thread %d, available threads to resolve: ",
- fv.value, id_to_int(get_reader(0)->get_tid()));
- bool failed = true;
- for (unsigned int i = 0; i < available_thread.size(); i++)
- if (available_thread[i]) {
- model_print("[%d]", i);
- failed = false;
- }
- if (failed)
- model_print("(none)");
- model_print("\n");
-}
-
-/**
- * Check if this promise has failed. A promise can fail when all threads which
- * could possibly satisfy the promise have been eliminated.
- *
- * @return True, if this promise has failed; false otherwise
- */
-bool Promise::has_failed() const
-{
- return num_available_threads == 0;
-}
-
-/**
- * @brief Check if an action's thread and location are compatible for resolving
- * this promise
- * @param act The action to check against
- * @return True if we are compatible; false otherwise
- */
-bool Promise::is_compatible(const ModelAction *act) const
-{
- return thread_is_available(act->get_tid()) && get_reader(0)->same_var(act);
-}
-
-/**
- * @brief Check if an action's thread and location are compatible for resolving
- * this promise, and that the promise is thread-exclusive
- * @param act The action to check against
- * @return True if we are compatible and exclusive; false otherwise
- */
-bool Promise::is_compatible_exclusive(const ModelAction *act) const
-{
- return get_num_available_threads() == 1 && is_compatible(act);
-}
-
-/**
- * @brief Check if a store's value matches this Promise
- * @param write The store to check
- * @return True if the store's written value matches this Promise
- */
-bool Promise::same_value(const ModelAction *write) const
-{
- return get_value() == write->get_write_value();
-}
-
-/**
- * @brief Check if a ModelAction's location matches this Promise
- * @param act The ModelAction to check
- * @return True if the action's location matches this Promise
- */
-bool Promise::same_location(const ModelAction *act) const
-{
- return get_reader(0)->same_var(act);
-}
-
-/** @brief Get this Promise's index within the execution's promise array */
-int Promise::get_index() const
-{
- return execution->get_promise_number(this);
-}
projects / c11tester.git / blobdiff