os_util.hpp

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//===-- os_util.hpp - OS utilities -----------------------------*- C++ -*--===//
//
// 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
//
//===----------------------------------------------------------------------===//
 
// Abstracts the operating system services.
 
#pragma once
 
#include <sycl/detail/defines.hpp>
#include <sycl/detail/export.hpp>
 
#include <cstdint>
#include <cstdlib>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>
 
#ifdef _WIN32
#define __SYCL_RT_OS_WINDOWS
// Windows platform
#ifdef _WIN64
// 64-bit Windows platform
#else
// 32-bit Windows platform
#endif // _WIN64
#elif __linux__
// Linux platform
#define __SYCL_RT_OS_LINUX
#define __SYCL_RT_OS_POSIX_SUPPORT
#elif defined(__APPLE__) && defined(__MACH__)
// Apple OSX
#define __SYCL_RT_OS_DARWIN
#define __SYCL_RT_OS_POSIX_SUPPORT
#else
#error "Unsupported compiler or OS"
#endif // _WIN32
 
namespace sycl {
__SYCL_INLINE_VER_NAMESPACE(_V1) {
namespace detail {
 
using OSModuleHandle = intptr_t;
 
class __SYCL_EXPORT OSUtil {
public:
  static OSModuleHandle getOSModuleHandle(const void *VirtAddr);
 
  static std::string getCurrentDSODir();
 
  static std::string getDirName(const char *Path);
 
  static constexpr OSModuleHandle ExeModuleHandle = -1;
 
  static constexpr OSModuleHandle DummyModuleHandle = -2;
 
#ifdef __SYCL_RT_OS_WINDOWS
  static constexpr const char *DirSep = "\\";
#else
  static constexpr const char *DirSep = "/";
#endif
 
  static size_t getOSMemSize();
 
  static void *alignedAlloc(size_t Alignment, size_t NumBytes);
 
  static void alignedFree(void *Ptr);
 
  static int makeDir(const char *Dir);
 
  static inline bool isPathPresent(const std::string &Path) {
#ifdef __SYCL_RT_OS_WINDOWS
    struct _stat Stat;
    return !_stat(Path.c_str(), &Stat);
#else
    struct stat Stat;
    return !stat(Path.c_str(), &Stat);
#endif
  }
};
 
} // namespace detail
} // __SYCL_INLINE_VER_NAMESPACE(_V1)
} // namespace sycl