/*
 * (c) Copyright, Real-Time Innovations, 2010-2024.
 * All rights reserved.
 *
 * No duplications, whole or partial, manual or electronic, may be made
 * without express written permission.  Any such copies, or
 * revisions thereof, must display this notice unaltered.
 * This code contains trade secrets of Real-Time Innovations, Inc.
 */

#ifndef osapi_cpu_h
#define osapi_cpu_h

#include "osapi/osapi_dll.h"
#include "osapi/osapi_type.h"

#ifdef __cplusplus
extern "C" {
#endif

/** @internal \file
 * \brief Processor related utility
 */

/** @internal \defgroup RTIOsapiCpuBitmapClass RTIOsapiCpuBitmap
 *   \ingroup RTIOsapiModule
 *   \brief Bitmask of available processors.
 */
#if defined(RTI_QNX)
  #define RTI_OSAPI_CPU_BITMAP_MAX_BITS (32)
#else
  #define RTI_OSAPI_CPU_BITMAP_MAX_BITS (1024)
#endif
#define RTI_OSAPI_CPU_BITMAP_LENGTH (RTI_OSAPI_CPU_BITMAP_MAX_BITS / 32)

#define RTI_OSAPI_CPU_NO_ROTATION (0)
#define RTI_OSAPI_CPU_RR_ROTATION (1)

struct RTIOsapiCpuBitmap {
    RTI_UINT32 mask[RTI_OSAPI_CPU_BITMAP_LENGTH];
    int rotation;
    int _numCpus;
    int _numUses;
};


#if defined(RTI_QNX)
  #define RTI_OSAPI_CPU_BITMAP_DEFAULT \
    { \
      { 0 }, RTI_OSAPI_CPU_NO_ROTATION, 0, 0 \
    }
#else
  #define RTI_OSAPI_CPU_BITMAP_DEFAULT \
    { \
      { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, \
              RTI_OSAPI_CPU_NO_ROTATION, 0, 0 \
    }
#endif

#define RTIOsapiCpuBitmap_test(me, i) \
  ((me)->mask[i >> 5] & (RTI_UINT32) (1U << (i & 0x1F)))
#define RTIOsapiCpuBitmap_set(me, i) \
  do { \
    if (((me)->mask[i >> 5] & (RTI_UINT32) (1U << (i & 0x1F))) == 0) \
      (me)->_numCpus++; \
    (me)->mask[i >> 5] |= (RTI_UINT32) (1U << (i & 0x1F)); \
  } while (0)

#define RTIOsapiCpuBitmap_zero(me) RTIOsapiMemory_zero((me), sizeof(*(me)))
#define RTIOsapiCpuBitmap_incrementUseCounter(me) ((me)->_numUses++)
#define RTIOsapiCpuBitmap_copy(to, src) \
  RTIOsapiMemory_copy((to), (src), sizeof(*(src)))


extern RTIOsapiDllExport RTIBool RTIOsapiCpuBitmap_equals(
        const struct RTIOsapiCpuBitmap *me,
        const struct RTIOsapiCpuBitmap *other);

extern RTIOsapiDllExport void RTIOsapiCpuBitmap_toStringI(
        struct RTIOsapiCpuBitmap *me,
        char *dst,
        int max);


#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* osapi_cpu_h */