forked from github/verilator
96a4b3e5a5
- Regroup and sort #include directives (like we used to, but automatic) - Set AlwaysBreakTemplateDeclarations to true
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
|
|
//*************************************************************************
|
|
//
|
|
// Copyright 2018-2018 by Wilson Snyder. This program is free software; you can
|
|
// redistribute it and/or modify it under the terms of either the GNU
|
|
// Lesser General Public License Version 3 or the Perl Artistic License
|
|
// Version 2.0.
|
|
// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
|
|
//
|
|
//*************************************************************************
|
|
|
|
#include "svdpi.h"
|
|
|
|
#include <atomic>
|
|
#include <cstdio>
|
|
#include <iostream>
|
|
#include <unistd.h>
|
|
|
|
//======================================================================
|
|
|
|
// clang-format off
|
|
#if defined(VERILATOR)
|
|
# ifdef T_DPI_THREADS_COLLIDE
|
|
# include "Vt_dpi_threads_collide__Dpi.h"
|
|
# else
|
|
# include "Vt_dpi_threads__Dpi.h"
|
|
# endif
|
|
#elif defined(VCS)
|
|
# include "../vc_hdrs.h"
|
|
#elif defined(CADENCE)
|
|
# define NEED_EXTERNS
|
|
#else
|
|
# error "Unknown simulator for DPI test"
|
|
#endif
|
|
// clang-format on
|
|
|
|
#ifdef NEED_EXTERNS
|
|
extern "C" {
|
|
extern void dpii_sys_task();
|
|
extern int dpii_failure();
|
|
}
|
|
#endif
|
|
|
|
//======================================================================
|
|
|
|
struct state {
|
|
std::atomic<bool> task_is_running;
|
|
std::atomic<int> failure;
|
|
state()
|
|
: task_is_running(false)
|
|
, failure(false) {}
|
|
};
|
|
|
|
static state st;
|
|
|
|
void dpii_sys_task() {
|
|
bool other_task_running = atomic_exchange(&st.task_is_running, true);
|
|
if (other_task_running) {
|
|
// Another task is running. This is a collision.
|
|
st.failure = 1;
|
|
std::cerr << "t_dpi_threads_c.cpp dpii_sys_task() saw threads collide.\n";
|
|
} else {
|
|
std::cerr << "t_dpi_threads_c.cpp dpii_sys_task() no collision. @" << &st.task_is_running
|
|
<< "\n";
|
|
}
|
|
|
|
// Spend some time in the DPI call, so that if we can have a collision
|
|
// we probably will. Technically this is not guaranteed to detect every
|
|
// race. However, one second is so much greater than the expected
|
|
// runtime of everything else in the test, it really should pick up on
|
|
// races just about all of the time.
|
|
sleep(1);
|
|
|
|
atomic_exchange(&st.task_is_running, false);
|
|
}
|
|
|
|
int dpii_failure() { return st.failure; }
|