MR_LIBS/omp_8h_source.html

#ifndef DMLC_OMP_H_

#define DMLC_OMP_H_


#if defined(_OPENMP)

#include <omp.h>

#else


#if defined(__clang__)

#undef __GOMP_NOTHROW

#define __GOMP_NOTHROW

#elif defined(__cplusplus)

#undef __GOMP_NOTHROW

#define __GOMP_NOTHROW throw()

#else

#undef __GOMP_NOTHROW

#define __GOMP_NOTHROW __attribute__((__nothrow__))

#endif


#ifdef __cplusplus

extern "C" {

#endif

inline int omp_get_thread_num() __GOMP_NOTHROW { return 0; }

inline int omp_get_num_threads() __GOMP_NOTHROW { return 1; }

inline int omp_get_max_threads() __GOMP_NOTHROW { return 1; }

inline int omp_get_num_procs() __GOMP_NOTHROW { return 1; }

inline void omp_set_num_threads(int nthread) __GOMP_NOTHROW {}

inline int omp_in_parallel() __GOMP_NOTHROW { return 0; }

#ifdef __cplusplus

}

#endif  // __cplusplus

#endif  // _OPENMP


// loop variable used in openmp

namespace dmlc {

#ifdef _MSC_VER

typedef int omp_uint;

typedef long omp_ulong;  // NOLINT(*)

#else

typedef unsigned omp_uint;

typedef unsigned long omp_ulong; // NOLINT(*)

#endif

}  // namespace dmlc

#endif  // DMLC_OMP_H_

dmlc
namespace for dmlc
Definition array_view.h:12

xgboost::omp_ulong
dmlc::omp_ulong omp_ulong
define unsigned long for openmp loop
Definition base.h:322

omp.h
header to handle OpenMP compatibility issues