libc/src/stdlib/gpu/realloc.cpp

   1 //===-- GPU Implementation of realloc -------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/stdlib/realloc.h"
  10
  11 #include "src/__support/GPU/allocator.h"
  12 #include "src/__support/common.h"
  13 #include "src/__support/macros/config.h"
  14 #include "src/string/memory_utils/inline_memcpy.h"
  15
  16 namespace LIBC_NAMESPACE_DECL {
  17
  18 LLVM_LIBC_FUNCTION(void *, realloc, (void *ptr, size_t size)) {
  19   if (ptr == nullptr)
  20     return gpu::allocate(size);
  21
  22   void *newmem = gpu::allocate(size);
  23   if (newmem == nullptr)
  24     return nullptr;
  25
  26   // This will copy garbage if it goes beyond the old allocation size.
  27   inline_memcpy(newmem, ptr, size);
  28   gpu::deallocate(ptr);
  29   return newmem;
  30 }
  31
  32 } // namespace LIBC_NAMESPACE_DECL