mono/metadata/pal-android.c

   1 /**
   2  * \file
   3  * System.Native PAL internal calls (Android)
   4  * Adapter code between the Mono runtime and the CoreFX Platform Abstraction Layer (PAL)
   5  * Copyright 2018 Microsoft
   6  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   7 */
   8
   9 #include <unistd.h>
  10 #include <assert.h>
  11
  12 #include "pal_compiler.h"
  13 #include "pal_config.h"
  14 #include "pal_errno.h"
  15 #include "pal_utilities.h"
  16
  17 #include "pal-android.h"
  18
  19 int32_t SystemNative_Read(intptr_t fd, void* buffer, int32_t bufferSize)
  20 {
  21     assert(buffer != NULL || bufferSize == 0);
  22     assert(bufferSize >= 0);
  23
  24     if (bufferSize < 0)
  25     {
  26         errno = EINVAL;
  27         return -1;
  28     }
  29
  30     ssize_t count;
  31     count = read(ToFileDescriptor(fd), buffer, (uint32_t)bufferSize);
  32
  33     assert(count >= -1 && count <= bufferSize);
  34     return (int32_t)count;
  35 }