libpthread-137.1.1.tar.gz

[apple/libpthread.git] / src / resolver.c

diff --git a/src/resolver.c b/src/resolver.c
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+++ b/src/resolver.c
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+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_START@
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_END@
+ */
+
+#include "resolver_internal.h"
+
+#define _OS_VARIANT_RESOLVER(s, v, ...) \
+       __attribute__((visibility(OS_STRINGIFY(v)))) extern void* s(void); \
+       void* s(void) { \
+       __asm__(".symbol_resolver _" OS_STRINGIFY(s)); \
+               __VA_ARGS__ \
+       }
+
+#define _OS_VARIANT_UPMP_RESOLVER(s, v) \
+       _OS_VARIANT_RESOLVER(s, v, \
+               uint32_t *_c = (void*)(uintptr_t)_COMM_PAGE_CPU_CAPABILITIES; \
+               if (*_c & kUP) { \
+                       extern void OS_VARIANT(s, up)(void); \
+                       return &OS_VARIANT(s, up); \
+               } else { \
+                       extern void OS_VARIANT(s, mp)(void); \
+                       return &OS_VARIANT(s, mp); \
+               })
+
+#define OS_VARIANT_UPMP_RESOLVER(s) \
+       _OS_VARIANT_UPMP_RESOLVER(s, default)
+
+#define OS_VARIANT_UPMP_RESOLVER_INTERNAL(s) \
+       _OS_VARIANT_UPMP_RESOLVER(s, hidden)
+
+
+#ifdef OS_VARIANT_SELECTOR
+
+OS_VARIANT_UPMP_RESOLVER(pthread_mutex_lock)
+OS_VARIANT_UPMP_RESOLVER(pthread_mutex_trylock)
+OS_VARIANT_UPMP_RESOLVER(pthread_mutex_unlock)
+
+#endif // OS_VARIANT_SELECTOR