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//===----------- rtl.cpp - Target independent OpenMP target RTL -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Initialization and tear down of the offload runtime.
//
//===----------------------------------------------------------------------===//
#include "OpenMP/OMPT/Callback.h"
#include "PluginManager.h"
#include "Shared/Debug.h"
#include "Shared/Profile.h"
#ifdef OMPT_SUPPORT
extern void llvm::omp::target::ompt::connectLibrary();
#endif
static std::mutex PluginMtx;
static uint32_t RefCount = 0;
std::atomic<bool> RTLAlive{false};
std::atomic<int> RTLOngoingSyncs{0};
void initRuntime() {
std::scoped_lock<decltype(PluginMtx)> Lock(PluginMtx);
Profiler::get();
TIMESCOPE();
if (PM == nullptr)
PM = new PluginManager();
RefCount++;
if (RefCount == 1) {
DP("Init offload library!\n");
#ifdef OMPT_SUPPORT
// Initialize OMPT first
llvm::omp::target::ompt::connectLibrary();
#endif
PM->init();
PM->registerDelayedLibraries();
// RTL initialization is complete
RTLAlive = true;
}
}
void deinitRuntime() {
std::scoped_lock<decltype(PluginMtx)> Lock(PluginMtx);
assert(PM && "Runtime not initialized");
if (RefCount == 1) {
DP("Deinit offload library!\n");
// RTL deinitialization has started
RTLAlive = false;
while (RTLOngoingSyncs > 0) {
DP("Waiting for ongoing syncs to finish, count: %d\n",
RTLOngoingSyncs.load());
std::this_thread::sleep_for(std::chrono::milliseconds(100));
}
PM->deinit();
delete PM;
PM = nullptr;
}
RefCount--;
}
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