libpthread-454.40.3.tar.gz

[apple/libpthread.git] / src / offsets_internal.h

diff --git a/src/offsets_internal.h b/src/offsets_internal.h
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+/*
+ * Copyright (c) 2018 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef _POSIX_PTHREAD_OFFSETS_H
+#define _POSIX_PTHREAD_OFFSETS_H
+
+#if defined(__i386__)
+#define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   140
+#define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET 144
+#elif __LP64__
+#define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   -48
+#define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET -40
+#else
+#define _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET   -36
+#define _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET -32
+#endif
+
+#ifndef __ASSEMBLER__
+#include "pthread/private.h" // for other _PTHREAD_STRUCT_DIRECT_*_OFFSET
+
+#define check_backward_offset(field, value) \
+               _Static_assert(offsetof(struct pthread_s, tsd) + value == \
+                               offsetof(struct pthread_s, field), #value " is correct")
+#define check_forward_offset(field, value) \
+               _Static_assert(offsetof(struct pthread_s, field) == value, \
+                               #value " is correct")
+
+check_forward_offset(tsd, _PTHREAD_STRUCT_DIRECT_TSD_OFFSET);
+check_backward_offset(thread_id, _PTHREAD_STRUCT_DIRECT_THREADID_OFFSET);
+#if defined(__i386__)
+check_forward_offset(stackaddr, _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET);
+check_forward_offset(stackbottom, _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET);
+#else
+check_backward_offset(stackaddr, _PTHREAD_STRUCT_DIRECT_STACKADDR_OFFSET);
+check_backward_offset(stackbottom, _PTHREAD_STRUCT_DIRECT_STACKBOTTOM_OFFSET);
+#endif
+
+#endif // __ASSEMBLER__
+
+#endif /* _POSIX_PTHREAD_OFFSETS_H */