--- /dev/null
+/*
+ * Copyright (c) 2013 On-Line Applications Research Corporation.
+ * All rights reserved.
+ *
+ * On-Line Applications Research Corporation
+ * 7047 Old Madison Pike Suite 320
+ * Huntsville Alabama 35806
+ * <info@oarcorp.com>
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+
+/*
+ * This file implements an API compatible with static portion of
+ * the GNU/Linux cpu_set_t macros but is independently implemented.
+ * The GNU/Linux manual page and the FreeBSD cpuset_t implementation
+ * were used as reference material.
+ *
+ * Not implemented:
+ * + Linux CPU_XXX_S
+ * + FreeBSD CPU_SUBSET
+ * + FreeBSD CPU_OVERLAP
+ */
+
+
+#ifndef _SYS_CPUSET_H_
+#define _SYS_CPUSET_H_
+
+#if 0
+#include <sys/types.h>
+#endif
+#include <stdint.h>
+
+/* RTEMS supports a maximum of 32 CPU cores */
+#ifndef CPU_SETSIZE
+#define CPU_SETSIZE 32
+#endif
+
+/* word in the cpu set */
+typedef uint32_t cpu_set_word_t;
+
+/* Number of bits per cpu_set_t element */
+#define _NCPUBITS (sizeof(cpu_set_word_t) * NBBY) /* bits per mask */
+
+/* Number of words in the cpu_set_t array */
+/* NOTE: Can't use howmany() because of circular dependency */
+#define _NCPUWORDS (((CPU_SETSIZE)+((_NCPUBITS)-1))/(_NCPUBITS))
+
+/* Define the cpu set structure */
+typedef struct _cpuset {
+ cpu_set_word_t __bits[_NCPUWORDS];
+} cpu_set_t;
+
+/* determine the mask for a particular cpu within the element */
+static inline cpu_set_word_t __cpuset_mask( size_t cpu )
+{
+ return ((cpu_set_word_t)1 << ((cpu) % _NCPUBITS));
+}
+
+/* determine the index for this cpu within the cpu set array */
+static inline size_t __cpuset_index( size_t cpu )
+{
+ return ((cpu)/_NCPUBITS);
+}
+
+/* zero out set */
+static inline void CPU_ZERO( cpu_set_t *set )
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ set->__bits[i] = 0;
+}
+
+/* fill set */
+static inline void CPU_FILL( cpu_set_t *set )
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ set->__bits[i] = -1;
+}
+
+/* set cpu within set */
+static inline void CPU_SET( size_t cpu, cpu_set_t *set )
+{
+ set->__bits[__cpuset_index(cpu)] |= __cpuset_mask(cpu);
+}
+
+/* clear cpu within set */
+static inline void CPU_CLR( size_t cpu, cpu_set_t *set )
+{
+ set->__bits[__cpuset_index(cpu)] &= ~__cpuset_mask(cpu);
+}
+
+/* Return 1 is cpu is set in set, 0 otherwise */
+static inline int const CPU_ISSET( size_t cpu, const cpu_set_t *set )
+{
+ return ((set->__bits[__cpuset_index(cpu)] & __cpuset_mask(cpu)) != 0);
+}
+
+/* copy src set to dest set */
+static inline void CPU_COPY( cpu_set_t *dest, const cpu_set_t *src )
+{
+ *dest = *src;
+}
+
+/* logical and: dest set = src1 set and src2 set */
+static inline void CPU_AND(
+ cpu_set_t *dest, const cpu_set_t *src1, const cpu_set_t *src2
+)
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ dest->__bits[i] = src1->__bits[i] & src2->__bits[i];
+}
+
+/* logical or: dest set = src1 set or src2 set */
+static inline void CPU_OR(
+ cpu_set_t *dest, const cpu_set_t *src1, const cpu_set_t *src2
+)
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ dest->__bits[i] = src1->__bits[i] | src2->__bits[i];
+}
+
+/* logical xor: dest set = src1 set xor src2 set */
+static inline void CPU_XOR(
+ cpu_set_t *dest, const cpu_set_t *src1, const cpu_set_t *src2
+)
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ dest->__bits[i] = src1->__bits[i] ^ src2->__bits[i];
+}
+
+/* logical nand: dest set = src1 set nand src2 set */
+static inline void CPU_NAND(
+ cpu_set_t *dest, const cpu_set_t *src1, const cpu_set_t *src2
+)
+{
+ size_t i;
+ for (i = 0; i < _NCPUWORDS; i++)
+ dest->__bits[i] = ~(src1->__bits[i] & src2->__bits[i]);
+}
+
+/* return the number of set cpus in set */
+static inline int const CPU_COUNT( const cpu_set_t *set )
+{
+ size_t i;
+ int count = 0;
+
+ for (i=0; i < _NCPUWORDS; i++)
+ if (CPU_ISSET(i, set) != 0)
+ count++;
+ return count;
+}
+
+/* return 1 if the sets set1 and set2 are equal, otherwise return 0 */
+static inline int const CPU_EQUAL(
+ const cpu_set_t *set1, const cpu_set_t *set2
+)
+{
+ size_t i;
+
+ for (i=0; i < _NCPUWORDS; i++)
+ if (set1->__bits[i] != set2->__bits[i] )
+ return 0;
+ return 1;
+}
+
+/* return 1 if the sets set1 and set2 are equal, otherwise return 0 */
+static inline int const CPU_CMP( const cpu_set_t *set1, const cpu_set_t *set2 )
+{
+ return CPU_EQUAL(set1, set2);
+}
+
+/* return 1 if the set is empty, otherwise return 0 */
+static inline int const CPU_EMPTY( const cpu_set_t *set )
+{
+ size_t i;
+
+ for (i=0; i < _NCPUWORDS; i++)
+ if (set->__bits[i] != 0 )
+ return 0;
+ return 1;
+}
+
+#endif
git://sourceware.org / newlib-cygwin.git / commitdiff