148 lines
4.3 KiB
C++
Executable File
148 lines
4.3 KiB
C++
Executable File
/* Copyright 2015-2017 Philippe Tillet
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <cassert>
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#include "triton/driver/context.h"
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#include "triton/driver/module.h"
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#include "triton/tools/sys/getenv.hpp"
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#include "triton/tools/sys/mkdir.hpp"
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namespace triton
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{
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namespace driver
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{
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/* ------------------------ */
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// BASE //
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/* ------------------------ */
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context::context(driver::device *dev, CUcontext cu, bool take_ownership):
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polymorphic_resource(cu, take_ownership),
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dev_(dev), cache_path_(get_cache_path()) {
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}
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context::context(driver::device *dev, cl_context cl, bool take_ownership):
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polymorphic_resource(cl, take_ownership),
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dev_(dev), cache_path_(get_cache_path()){
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}
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context::context(driver::device *dev, host_context_t hst, bool take_ownership):
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polymorphic_resource(hst, take_ownership),
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dev_(dev), cache_path_(get_cache_path()){
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}
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context* context::create(driver::device *dev){
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switch(dev->backend()){
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case CUDA: return new cu_context(dev);
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case OpenCL: return new ocl_context(dev);
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case Host: return new host_context(dev);
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default: throw std::runtime_error("unknown backend");
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}
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}
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driver::device* context::device() const {
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return dev_;
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}
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std::string context::get_cache_path(){
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//user-specified cache path
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std::string result = tools::getenv("TRITON_CACHE_PATH");
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if(!result.empty()){
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if(tools::mkpath(result)==0)
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return result;
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}
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//create in home
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result = tools::getenv("HOME");
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if(!result.empty())
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{
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result = result + "/.triton/cache/";
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if(tools::mkpath(result)==0)
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return result;
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}
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//couldn't find a directory
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return "";
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}
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std::string const & context::cache_path() const{
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return cache_path_;
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}
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/* ------------------------ */
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// Host //
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/* ------------------------ */
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host_context::host_context(driver::device* dev): context(dev, host_context_t(), true){
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}
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/* ------------------------ */
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// CUDA //
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/* ------------------------ */
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// RAII context switcher
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cu_context::context_switcher::context_switcher(const context &ctx): ctx_((const cu_context&)ctx) {
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dispatch::cuCtxPushCurrent_v2(*ctx_.cu());
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}
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cu_context::context_switcher::~context_switcher() {
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CUcontext tmp;
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dispatch::cuCtxPopCurrent_v2(&tmp);
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assert(tmp==*ctx_.cu() && "Switching back to invalid context!");
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}
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// import CUdevice
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CUdevice cu_context::get_device_of(CUcontext context){
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dispatch::cuCtxPushCurrent_v2(context);
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CUdevice res;
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dispatch::cuCtxGetDevice(&res);
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dispatch::cuCtxPopCurrent_v2(NULL);
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return res;
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}
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// wrapper for cuda context
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cu_context::cu_context(CUcontext context, bool take_ownership): driver::context(new driver::cu_device(get_device_of(context), false),
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context, take_ownership) {
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}
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cu_context::cu_context(driver::device* device): context(device, CUcontext(), true){
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dispatch::cuCtxCreate(&*cu_, CU_CTX_SCHED_AUTO, *((driver::cu_device*)dev_)->cu());
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dispatch::cuCtxPopCurrent_v2(NULL);
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}
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/* ------------------------ */
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// OpenCL //
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/* ------------------------ */
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ocl_context::ocl_context(driver::device* dev): context(dev, cl_context(), true) {
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cl_int err;
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*cl_ = dispatch::clCreateContext(nullptr, 1, &*dev->cl(), nullptr, nullptr, &err);
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check(err);
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}
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}
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}
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