ucx: src/ucx/ucx.h@3b985a4eb05b (annotated)

src/ucx/ucx.h@3b985a4eb05b (annotated)

src/ucx/ucx.h

Sun, 07 Oct 2018 09:00:08 +0200

author: Olaf Wintermann <olaf.wintermann@gmail.com>
date: Sun, 07 Oct 2018 09:00:08 +0200
changeset 331: 3b985a4eb05b
parent 306: 90b6d69bb499
child 334: bc81faa9afda
permissions: -rw-r--r--

fixes ucx_szmul definition for gcc < 5

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /**
  * Main UCX Header providing most common definitions.
  *
  * @file   ucx.h
  * @author Mike Becker
  * @author Olaf Wintermann
  */
 #ifndef UCX_H
 #define	UCX_H
 /** Major UCX version as integer constant. */
 #define UCX_VERSION_MAJOR   2
 /** Minor UCX version as integer constant. */
 #define UCX_VERSION_MINOR   0
 /** Version constant which ensures to increase monotonically. */
 #define UCX_VERSION (((UCX_VERSION_MAJOR)<<16)|UCX_VERSION_MINOR)
 #include <stdlib.h>
 #include <stdint.h>
 #ifdef _WIN32
 #if !(defined __ssize_t_defined || defined _SSIZE_T_)
 #include <BaseTsd.h>
 typedef SSIZE_T ssize_t;
 #define __ssize_t_defined
 #define _SSIZE_T_
 #endif /* __ssize_t_defined and _SSIZE_T */
 #else /* !_WIN32 */
 #include <sys/types.h>
 #endif /* _WIN32 */
 #ifdef	__cplusplus
 extern "C" {
 #endif
 /**
  * A function pointer to a destructor function.
  * @see ucx_mempool_setdestr()
  * @see ucx_mempool_regdestr()
  */
 typedef void(*ucx_destructor)(void*);
 /**
  * Function pointer to a compare function.
  *
  * The compare function shall take three arguments: the two values that shall be
  * compared and optional additional data.
  * The function shall then return -1 if the first argument is less than the
  * second argument, 1 if the first argument is greater than the second argument
  * and 0 if both arguments are equal. If the third argument is
  * <code>NULL</code>, it shall be ignored.
  */
 typedef int(*cmp_func)(const void*,const void*,void*);
 /**
  * Function pointer to a distance function.
  *
  * The distance function shall take three arguments: the two values for which
  * the distance shall be computed and optional additional data.
  * The function shall then return the signed distance as integer value.
  */
 typedef intmax_t(*distance_func)(const void*,const void*,void*);
 /**
  * Function pointer to a copy function.
  *
  * The copy function shall create a copy of the first argument and may use
  * additional data provided by the second argument. If the second argument is
  * <code>NULL</code>, it shall be ignored.
  * <b>Attention:</b> if pointers returned by functions of this type may be
  * passed to <code>free()</code> depends on the implementation of the
  * respective <code>copy_func</code>.
  */
 typedef void*(*copy_func)(const void*,void*);
 /**
  * Function pointer to a write function.
  *
  * The signature of the write function shall be compatible to the signature
  * of standard <code>fwrite</code>, though it may use arbitrary data types for
  * source and destination.
  *
  * The arguments shall contain (in ascending order): a pointer to the source,
  * the length of one element, the element count and a pointer to the
  * destination.
  */
 typedef size_t(*write_func)(const void*, size_t, size_t, void*);
 /**
  * Function pointer to a read function.
  *
  * The signature of the read function shall be compatible to the signature
  * of standard <code>fread</code>, though it may use arbitrary data types for
  * source and destination.
  *
  * The arguments shall contain (in ascending order): a pointer to the
  * destination, the length of one element, the element count and a pointer to
  * the source.
  */
 typedef size_t(*read_func)(void*, size_t, size_t, void*);
 #if __GNUC__ >= 5 || defined(__clang__)
 #define UCX_MUL_BUILTIN
 #if __WORDSIZE == 32
 /**
  * Alias for <code>__builtin_umul_overflow</code>.
  *
  * Performs a multiplication of size_t values and checks for overflow.
  *
  * @param a first operand
  * @param b second operand
  * @param result a pointer to a size_t, where the result should
  * be stored
  * @return zero, if no overflow occurred and the result is correct, non-zero
  * otherwise
  */
 #define ucx_szmul(a, b, result) __builtin_umul_overflow(a, b, result)
 #else /* __WORDSIZE != 32 */
 /**
  * Alias for <code>__builtin_umull_overflow</code>.
  *
  * Performs a multiplication of size_t values and checks for overflow.
  *
  * @param a first operand
  * @param b second operand
  * @param result a pointer to a size_t, where the result should
  * be stored
  * @return zero, if no overflow occurred and the result is correct, non-zero
  * otherwise
  */
 #define ucx_szmul(a, b, result) __builtin_umull_overflow(a, b, result)
 #endif /* __WORDSIZE */
 #else /* no GNUC or clang bultin */
 /**
  * Performs a multiplication of size_t values and checks for overflow.
  *
  * This is a custom implementation in case there is no compiler builtin
  * available.
  *
  * @param a first operand
  * @param b second operand
  * @param result a pointer to a size_t, where the result should
  * be stored
  * @return zero, if no overflow occurred and the result is correct, non-zero
  * otherwise
  */
 #define ucx_szmul(a, b, result) ucx_szmul_impl(a, b, result)
 int ucx_szmul_impl(size_t a, size_t b, size_t *result);
 #endif
 #ifdef	__cplusplus
 }
 #endif
 #endif	/* UCX_H */

Mercurial > hg > ucx / annotate

src/ucx/ucx.h@3b985a4eb05b (annotated)

src/ucx/ucx.h