waterDataFluctuationCorrelation analysisOfTheCausesOfTheFluctuation.h 张婷 commit at 2020-09-25

waterDataFluctuationCorrelation/fluctuationCorrelationOfSprayEnd/analysisOfTheCausesOfTheFluctuation.h

@@ -0,0 +1,127 @@
+/*
+ * Atomic operations that C can't guarantee us.  Useful for
+ * resource counting etc..
+ *
+ * But use these as seldom as possible since they are much more slower
+ * than regular operations.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1996, 97, 99, 2000, 03, 04, 06 by Ralf Baechle
+ */
+#ifndef _ASM_ATOMIC_H
+#define _ASM_ATOMIC_H
+
+#include <linux/irqflags.h>
+#include <linux/types.h>
+#include <asm/barrier.h>
+#include <asm/cpu-features.h>
+#include <asm/cmpxchg.h>
+#include <asm/war.h>
+
+#define ATOMIC_INIT(i)    { (i) }
+
+/*
+ * atomic_read - read atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically reads the value of @v.
+ */
+#define atomic_read(v)		(*(volatile int *)&(v)->counter)
+
+/*
+ * atomic_set - set atomic variable
+ * @v: pointer of type atomic_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ */
+#define atomic_set(v, i)		((v)->counter = (i))
+
+/*
+ * atomic_add - add integer to atomic variable
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v.
+ */
+static __inline__ void atomic_add(int i, atomic_t * v)
+{
+	if (kernel_uses_llsc && R10000_LLSC_WAR) {
+		int temp;
+
+		__asm__ __volatile__(
+		"	.set	mips3					\n"
+		"1:	ll	%0, %1		# atomic_add		\n"
+		"	addu	%0, %2					\n"
+		"	sc	%0, %1					\n"
+		"	beqzl	%0, 1b					\n"
+		"	.set	mips0					\n"
+		: "=&r" (temp), "+m" (v->counter)
+		: "Ir" (i));
+	} else if (kernel_uses_llsc) {
+		int temp;
+
+		do {
+			__asm__ __volatile__(
+			"	.set	mips3				\n"
+			"	ll	%0, %1		# atomic_add	\n"
+			"	addu	%0, %2				\n"
+			"	sc	%0, %1				\n"
+			"	.set	mips0				\n"
+			: "=&r" (temp), "+m" (v->counter)
+			: "Ir" (i));
+		} while (unlikely(!temp));
+	} else {
+		unsigned long flags;
+
+		raw_local_irq_save(flags);
+		v->counter += i;
+		raw_local_irq_restore(flags);
+	}
+}
+
+/*
+ * atomic_sub - subtract the atomic variable
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v.
+ */
+static __inline__ void atomic_sub(int i, atomic_t * v)
+{
+	if (kernel_uses_llsc && R10000_LLSC_WAR) {
+		int temp;
+
+		__asm__ __volatile__(
+		"	.set	mips3					\n"
+		"1:	ll	%0, %1		# atomic_sub		\n"
+		"	subu	%0, %2					\n"
+		"	sc	%0, %1					\n"
+		"	beqzl	%0, 1b					\n"
+		"	.set	mips0					\n"
+		: "=&r" (temp), "+m" (v->counter)
+		: "Ir" (i));
+	} else if (kernel_uses_llsc) {
+		int temp;
+
+		do {
+			__asm__ __volatile__(
+			"	.set	mips3				\n"
+			"	ll	%0, %1		# atomic_sub	\n"
+			"	subu	%0, %2				\n"
+			"	sc	%0, %1				\n"
+			"	.set	mips0				\n"
+			: "=&r" (temp), "+m" (v->counter)
+			: "Ir" (i));
+		} while (unlikely(!temp));
+	} else {
+		unsigned long flags;
+
+		raw_local_irq_save(flags);
+		v->counter -= i;
+		raw_local_irq_restore(flags);
+	}
+}