text: /*
   * Copyright (c) 2013      Mellanox Technologies, Inc.
   *                         All rights reserved.
   * $COPYRIGHT$
   *
   * Additional copyrights may follow
   *
   * $HEADER$
   */
  #include "oshmem_config.h"
  
  #include "oshmem/constants.h"
  #include "oshmem/include/shmem.h"
  #include "oshmem/include/shmemx.h"
  
  #include "oshmem/runtime/runtime.h"
  
  #include "oshmem/mca/atomic/atomic.h"
  
  /*
   * shmem_cswap performs an atomic conditional swap operation.
   * The conditional swap routines write value to address target on PE pe, and return the previous
   * contents of target. The replacement must occur only if cond is equal to target;
   * otherwise target is left unchanged. In either case, the routine must return the initial value
   * of target. The operation must be completed without the possibility of another process updating
   * target between the time of the fetch and the update.
   */
  #define DO_SHMEM_TYPE_ATOMIC_COMPARE_SWAP(ctx, type, target, cond, value, pe, out_value) do { \
          int rc = OSHMEM_SUCCESS;                                    \
          size_t size = 0;                                            \
                                                                      \
          RUNTIME_CHECK_INIT();                                       \
          RUNTIME_CHECK_PE(pe);                                       \
          RUNTIME_CHECK_ADDR(target);                                 \
                                                                      \
          size = sizeof(value);                                       \
          rc = MCA_ATOMIC_CALL(cswap(                                 \
              ctx,                                                    \
              (void*)target,                                          \
              (uint64_t*)&out_value,                                  \
              OSHMEM_ATOMIC_PTR_2_INT(&cond, sizeof(cond)),           \
              OSHMEM_ATOMIC_PTR_2_INT(&value, sizeof(value)),         \
              size,                                                   \
              pe));                                                   \
          RUNTIME_CHECK_RC(rc);                                       \
      } while (0)
  
  #define SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(type_name, type, prefix) \
      type prefix##_ctx##type_name##_atomic_compare_swap(shmem_ctx_t ctx, type *target, type cond, type value, int pe) \
      {                                                               \
          type out_value;                                             \
          DO_SHMEM_TYPE_ATOMIC_COMPARE_SWAP(ctx, type, target, cond, value,  \
                                     pe, out_value);                  \
          return out_value;                                           \
      }
  
  #define SHMEM_TYPE_ATOMIC_COMPARE_SWAP(type_name, type, prefix)     \
      type prefix##type_name##_atomic_compare_swap(type *target, type cond, type value, int pe) \
      {                                                               \
          type out_value;                                             \
          DO_SHMEM_TYPE_ATOMIC_COMPARE_SWAP(oshmem_ctx_default, type, target, \
                                     cond, value, pe, out_value);     \
          return out_value;                                           \
      }
  
  #if OSHMEM_PROFILING
  #include "oshmem/include/pshmem.h"
  #pragma weak shmem_ctx_uint_atomic_compare_swap = pshmem_ctx_uint_atomic_compare_swap
  #pragma weak shmem_ctx_ulong_atomic_compare_swap = pshmem_ctx_ulong_atomic_compare_swap
  #pragma weak shmem_ctx_ulonglong_atomic_compare_swap = pshmem_ctx_ulonglong_atomic_compare_swap
  #pragma weak shmem_ctx_int_atomic_compare_swap = pshmem_ctx_int_atomic_compare_swap
  #pragma weak shmem_ctx_long_atomic_compare_swap = pshmem_ctx_long_atomic_compare_swap
  #pragma weak shmem_ctx_longlong_atomic_compare_swap = pshmem_ctx_longlong_atomic_compare_swap
  #pragma weak shmem_ctx_int32_atomic_compare_swap   	= pshmem_ctx_int32_atomic_compare_swap
  #pragma weak shmem_ctx_int64_atomic_compare_swap   	= pshmem_ctx_int64_atomic_compare_swap
  #pragma weak shmem_ctx_uint32_atomic_compare_swap   	= pshmem_ctx_uint32_atomic_compare_swap
  #pragma weak shmem_ctx_uint64_atomic_compare_swap   	= pshmem_ctx_uint64_atomic_compare_swap
  #pragma weak shmem_ctx_size_atomic_compare_swap   	= pshmem_ctx_size_atomic_compare_swap
  #pragma weak shmem_ctx_ptrdiff_atomic_compare_swap   	= pshmem_ctx_ptrdiff_atomic_compare_swap
  
  #pragma weak shmem_int_atomic_compare_swap = pshmem_int_atomic_compare_swap
  #pragma weak shmem_long_atomic_compare_swap = pshmem_long_atomic_compare_swap
  #pragma weak shmem_longlong_atomic_compare_swap = pshmem_longlong_atomic_compare_swap
  #pragma weak shmem_uint_atomic_compare_swap = pshmem_uint_atomic_compare_swap
  #pragma weak shmem_ulong_atomic_compare_swap = pshmem_ulong_atomic_compare_swap
  #pragma weak shmem_ulonglong_atomic_compare_swap = pshmem_ulonglong_atomic_compare_swap
  #pragma weak shmem_int32_atomic_compare_swap   	= pshmem_int32_atomic_compare_swap
  #pragma weak shmem_int64_atomic_compare_swap   	= pshmem_int64_atomic_compare_swap
  #pragma weak shmem_uint32_atomic_compare_swap   	= pshmem_uint32_atomic_compare_swap
  #pragma weak shmem_uint64_atomic_compare_swap   	= pshmem_uint64_atomic_compare_swap
  #pragma weak shmem_size_atomic_compare_swap    	= pshmem_size_atomic_compare_swap
  #pragma weak shmem_ptrdiff_atomic_compare_swap   	= pshmem_ptrdiff_atomic_compare_swap
  
  #pragma weak shmem_int_cswap = pshmem_int_cswap
  #pragma weak shmem_long_cswap = pshmem_long_cswap
  #pragma weak shmem_longlong_cswap = pshmem_longlong_cswap
  
  #pragma weak shmemx_int32_cswap = pshmemx_int32_cswap
  #pragma weak shmemx_int64_cswap = pshmemx_int64_cswap
  
  #include "oshmem/shmem/c/profile-defines.h"
  #endif
  
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_int, int, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_long, long, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_longlong, long long, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_uint, unsigned int, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_ulong, unsigned long, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_ulonglong, unsigned long long, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_int32, int32_t, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_int64, int64_t, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_uint32, uint32_t, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_uint64, uint64_t, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_size, size_t, shmem)
  SHMEM_CTX_TYPE_ATOMIC_COMPARE_SWAP(_ptrdiff, ptrdiff_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_int, int, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_long, long, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_longlong, long long, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_uint, unsigned int, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_ulong, unsigned long, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_ulonglong, unsigned long long, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_int32, int32_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_int64, int64_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_uint32, uint32_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_uint64, uint64_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_size, size_t, shmem)
  SHMEM_TYPE_ATOMIC_COMPARE_SWAP(_ptrdiff, ptrdiff_t, shmem)
  
  /* deprecated APIs */
  #define SHMEM_TYPE_CSWAP(type_name, type, prefix)                   \
      type prefix##type_name##_cswap(type *target, type cond, type value, int pe) \
      {                                                               \
          type out_value;                                             \
          DO_SHMEM_TYPE_ATOMIC_COMPARE_SWAP(oshmem_ctx_default, type, target, \
                                     cond, value, pe, out_value);     \
          return out_value;                                           \
      }
  
  SHMEM_TYPE_CSWAP(_int, int, shmem)
  SHMEM_TYPE_CSWAP(_long, long, shmem)
  SHMEM_TYPE_CSWAP(_longlong, long long, shmem)
  SHMEM_TYPE_CSWAP(_int32, int32_t, shmemx)
  SHMEM_TYPE_CSWAP(_int64, int64_t, shmemx)
  
  