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Diffstat (limited to 'erts/include/internal/ethread.h')
-rw-r--r--erts/include/internal/ethread.h162
1 files changed, 89 insertions, 73 deletions
diff --git a/erts/include/internal/ethread.h b/erts/include/internal/ethread.h
index 4cd95faf6a..8ad0ded144 100644
--- a/erts/include/internal/ethread.h
+++ b/erts/include/internal/ethread.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2004-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2004-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -33,10 +33,6 @@
#include <stdlib.h>
#include "erl_errno.h"
-#undef ETHR_HAVE_OPTIMIZED_ATOMIC_OPS
-#undef ETHR_HAVE_OPTIMIZED_SPINLOCK
-#undef ETHR_HAVE_OPTIMIZED_RWSPINLOCK
-
#if defined(DEBUG)
# define ETHR_DEBUG
#endif
@@ -68,7 +64,7 @@
#endif
/* Assume 64-byte cache line size */
-#define ETHR_CACHE_LINE_SIZE ((ethr_uint_t) 64)
+#define ETHR_CACHE_LINE_SIZE 64
#define ETHR_CACHE_LINE_MASK (ETHR_CACHE_LINE_SIZE - 1)
#define ETHR_CACHE_LINE_ALIGN_SIZE(SZ) \
@@ -251,13 +247,90 @@ typedef ethr_sint64_t ethr_sint_t;
typedef ethr_uint64_t ethr_uint_t;
#endif
-/* __builtin_expect() is needed by both native atomics code
- * and the fallback code */
-#if !defined(__GNUC__) || (__GNUC__ < 2) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
+#if defined(ETHR_SIZEOF___INT128_T) && ETHR_SIZEOF___INT128_T == 16
+#define ETHR_HAVE_INT128_T
+typedef __int128_t ethr_sint128_t;
+typedef __uint128_t ethr_uint128_t;
+#endif
+
+#define ETHR_FATAL_ERROR__(ERR) \
+ ethr_fatal_error__(__FILE__, __LINE__, __func__, (ERR))
+
+ETHR_PROTO_NORETURN__ ethr_fatal_error__(const char *file,
+ int line,
+ const char *func,
+ int err);
+
+#if !defined(__GNUC__)
+# define ETHR_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) 0
+#elif !defined(__GNUC_MINOR__)
+# define ETHR_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
+ ((__GNUC__ << 24) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
+#elif !defined(__GNUC_PATCHLEVEL__)
+# define ETHR_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
+ (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12)) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
+#else
+# define ETHR_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
+ (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12) | __GNUC_PATCHLEVEL__) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
+#endif
+
+#if !ETHR_AT_LEAST_GCC_VSN__(2, 96, 0)
#define __builtin_expect(X, Y) (X)
#endif
-/* For CPU-optimised atomics, spinlocks, and rwlocks. */
+#if ETHR_AT_LEAST_GCC_VSN__(3, 1, 1)
+# define ETHR_CHOOSE_EXPR __builtin_choose_expr
+#else
+# define ETHR_CHOOSE_EXPR(B, E1, E2) ((B) ? (E1) : (E2))
+#endif
+
+#if ((defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) \
+ || (defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_AMD64))))
+# define ETHR_X86_RUNTIME_CONF__
+
+# define ETHR_X86_RUNTIME_CONF_HAVE_DW_CMPXCHG__ \
+ (__builtin_expect(ethr_runtime__.conf.have_dw_cmpxchg != 0, 1))
+# define ETHR_X86_RUNTIME_CONF_HAVE_NO_DW_CMPXCHG__ \
+ (__builtin_expect(ethr_runtime__.conf.have_dw_cmpxchg == 0, 0))
+# define ETHR_X86_RUNTIME_CONF_HAVE_SSE2__ \
+ (__builtin_expect(ethr_runtime__.conf.have_sse2 != 0, 1))
+# define ETHR_X86_RUNTIME_CONF_HAVE_NO_SSE2__ \
+ (__builtin_expect(ethr_runtime__.conf.have_sse2 == 0, 0))
+#endif
+
+#if (defined(__GNUC__) \
+ && !defined(ETHR_PPC_HAVE_LWSYNC) \
+ && !defined(ETHR_PPC_HAVE_NO_LWSYNC) \
+ && (defined(__powerpc__) || defined(__ppc__) || defined(__powerpc64__)))
+# define ETHR_PPC_RUNTIME_CONF__
+
+# define ETHR_PPC_RUNTIME_CONF_HAVE_LWSYNC__ \
+ (__builtin_expect(ethr_runtime__.conf.have_lwsync != 0, 1))
+# define ETHR_PPC_RUNTIME_CONF_HAVE_NO_LWSYNC__ \
+ (__builtin_expect(ethr_runtime__.conf.have_lwsync == 0, 0))
+#endif
+
+typedef struct {
+#if defined(ETHR_X86_RUNTIME_CONF__)
+ int have_dw_cmpxchg;
+ int have_sse2;
+#endif
+#if defined(ETHR_PPC_RUNTIME_CONF__)
+ int have_lwsync;
+#endif
+ int dummy;
+} ethr_runtime_conf_t;
+
+
+typedef union {
+ ethr_runtime_conf_t conf;
+ char pad__[ETHR_CACHE_LINE_ALIGN_SIZE(sizeof(ethr_runtime_conf_t))+ETHR_CACHE_LINE_SIZE];
+} ethr_runtime_t;
+
+
+extern ethr_runtime_t ethr_runtime__;
+
+/* For native CPU-optimised atomics, spinlocks, and rwlocks. */
#if !defined(ETHR_DISABLE_NATIVE_IMPLS)
# if defined(__GNUC__)
# if defined(ETHR_PREFER_GCC_NATIVE_IMPLS)
@@ -265,7 +338,7 @@ typedef ethr_uint64_t ethr_uint_t;
# elif defined(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS)
# include "libatomic_ops/ethread.h"
# endif
-# ifndef ETHR_HAVE_NATIVE_ATOMICS
+# if !defined(ETHR_HAVE_NATIVE_ATOMIC32) && !defined(ETHR_HAVE_NATIVE_ATOMIC64)
# if ETHR_SIZEOF_PTR == 4
# if defined(__i386__)
# include "i386/ethread.h"
@@ -283,8 +356,10 @@ typedef ethr_uint64_t ethr_uint_t;
# include "sparc64/ethread.h"
# endif
# endif
+#if 0
# include "gcc/ethread.h"
# include "libatomic_ops/ethread.h"
+#endif
# endif
# elif defined(ETHR_HAVE_LIBATOMIC_OPS)
# include "libatomic_ops/ethread.h"
@@ -293,10 +368,9 @@ typedef ethr_uint64_t ethr_uint_t;
# endif
#endif /* !ETHR_DISABLE_NATIVE_IMPLS */
+#include "ethr_atomics.h" /* The atomics API */
+
#if defined(__GNUC__)
-# ifndef ETHR_COMPILER_BARRIER
-# define ETHR_COMPILER_BARRIER __asm__ __volatile__("" : : : "memory")
-# endif
# ifndef ETHR_SPIN_BODY
# if defined(__i386__) || defined(__x86_64__)
# define ETHR_SPIN_BODY __asm__ __volatile__("rep;nop" : : : "memory")
@@ -309,11 +383,6 @@ typedef ethr_uint64_t ethr_uint_t;
# endif
# endif
#elif defined(ETHR_WIN32_THREADS)
-# ifndef ETHR_COMPILER_BARRIER
-# include <intrin.h>
-# pragma intrinsic(_ReadWriteBarrier)
-# define ETHR_COMPILER_BARRIER _ReadWriteBarrier()
-# endif
# ifndef ETHR_SPIN_BODY
# define ETHR_SPIN_BODY do {YieldProcessor();ETHR_COMPILER_BARRIER;} while(0)
# endif
@@ -321,43 +390,6 @@ typedef ethr_uint64_t ethr_uint_t;
#define ETHR_YIELD_AFTER_BUSY_LOOPS 50
-#ifndef ETHR_HAVE_NATIVE_ATOMICS
-/*
- * ETHR_*MEMORY_BARRIER orders between locked and atomic accesses only,
- * i.e. when our lock based atomic fallback is used, a noop is sufficient.
- */
-#define ETHR_MEMORY_BARRIER do { } while (0)
-#define ETHR_WRITE_MEMORY_BARRIER do { } while (0)
-#define ETHR_READ_MEMORY_BARRIER do { } while (0)
-#define ETHR_READ_DEPEND_MEMORY_BARRIER do { } while (0)
-#endif
-
-#ifndef ETHR_WRITE_MEMORY_BARRIER
-# define ETHR_WRITE_MEMORY_BARRIER ETHR_MEMORY_BARRIER
-# define ETHR_WRITE_MEMORY_BARRIER_IS_FULL
-#endif
-#ifndef ETHR_READ_MEMORY_BARRIER
-# define ETHR_READ_MEMORY_BARRIER ETHR_MEMORY_BARRIER
-# define ETHR_READ_MEMORY_BARRIER_IS_FULL
-#endif
-#ifndef ETHR_READ_DEPEND_MEMORY_BARRIER
-# define ETHR_READ_DEPEND_MEMORY_BARRIER ETHR_COMPILER_BARRIER
-# define ETHR_READ_DEPEND_MEMORY_BARRIER_IS_COMPILER_BARRIER
-#endif
-
-#define ETHR_FATAL_ERROR__(ERR) \
- ethr_fatal_error__(__FILE__, __LINE__, __func__, (ERR))
-
-ETHR_PROTO_NORETURN__ ethr_fatal_error__(const char *file,
- int line,
- const char *func,
- int err);
-
-void ethr_compiler_barrier_fallback(void);
-#ifndef ETHR_COMPILER_BARRIER
-# define ETHR_COMPILER_BARRIER ethr_compiler_barrier_fallback()
-#endif
-
#ifndef ETHR_SPIN_BODY
# define ETHR_SPIN_BODY ETHR_COMPILER_BARRIER
#endif
@@ -460,8 +492,6 @@ void ethr_compiler_barrier(void);
#if defined(ETHR_HAVE_NATIVE_SPINLOCKS)
typedef ethr_native_spinlock_t ethr_spinlock_t;
-#elif defined(ETHR_HAVE_OPTIMIZED_SPINLOCKS)
-typedef ethr_opt_spinlock_t ethr_spinlock_t;
#elif defined(__WIN32__)
typedef CRITICAL_SECTION ethr_spinlock_t;
#else
@@ -483,8 +513,6 @@ ETHR_INLINE_FUNC_NAME_(ethr_spinlock_init)(ethr_spinlock_t *lock)
#ifdef ETHR_HAVE_NATIVE_SPINLOCKS
ethr_native_spinlock_init(lock);
return 0;
-#elif defined(ETHR_HAVE_OPTIMIZED_SPINLOCKS)
- return ethr_opt_spinlock_init((ethr_opt_spinlock_t *) lock);
#elif defined(__WIN32__)
if (!InitializeCriticalSectionAndSpinCount((CRITICAL_SECTION *) lock, INT_MAX))
return ethr_win_get_errno__();
@@ -498,9 +526,7 @@ static ETHR_INLINE int
ETHR_INLINE_FUNC_NAME_(ethr_spinlock_destroy)(ethr_spinlock_t *lock)
{
#ifdef ETHR_HAVE_NATIVE_SPINLOCKS
- return 0;
-#elif defined(ETHR_HAVE_OPTIMIZED_SPINLOCKS)
- return ethr_opt_spinlock_destroy((ethr_opt_spinlock_t *) lock);
+ return ethr_native_spinlock_destroy(lock);
#elif defined(__WIN32__)
DeleteCriticalSection((CRITICAL_SECTION *) lock);
return 0;
@@ -514,10 +540,6 @@ ETHR_INLINE_FUNC_NAME_(ethr_spin_unlock)(ethr_spinlock_t *lock)
{
#ifdef ETHR_HAVE_NATIVE_SPINLOCKS
ethr_native_spin_unlock(lock);
-#elif defined(ETHR_HAVE_OPTIMIZED_SPINLOCKS)
- int err = ethr_opt_spin_unlock((ethr_opt_spinlock_t *) lock);
- if (err)
- ETHR_FATAL_ERROR__(err);
#elif defined(__WIN32__)
LeaveCriticalSection((CRITICAL_SECTION *) lock);
#else
@@ -532,10 +554,6 @@ ETHR_INLINE_FUNC_NAME_(ethr_spin_lock)(ethr_spinlock_t *lock)
{
#ifdef ETHR_HAVE_NATIVE_SPINLOCKS
ethr_native_spin_lock(lock);
-#elif defined(ETHR_HAVE_OPTIMIZED_SPINLOCKS)
- int err = ethr_opt_spin_lock((ethr_opt_spinlock_t *) lock);
- if (err)
- ETHR_FATAL_ERROR__(err);
#elif defined(__WIN32__)
EnterCriticalSection((CRITICAL_SECTION *) lock);
#else
@@ -547,8 +565,6 @@ ETHR_INLINE_FUNC_NAME_(ethr_spin_lock)(ethr_spinlock_t *lock)
#endif /* ETHR_TRY_INLINE_FUNCS */
-#include "ethr_atomics.h"
-
typedef struct ethr_ts_event_ ethr_ts_event; /* Needed by ethr_mutex.h */
#if defined(ETHR_WIN32_THREADS)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 08:26:52 +0000