fix: handle EINTR correctly in get_cpu_mask_from_sysfs

[urcu.git] / include / urcu / lfstack.h

diff --git a/include/urcu/lfstack.h b/include/urcu/lfstack.h
index 43ef2a5ccad5b0b90ef38c818d691ccfee0e3476..77af43bf18069df89619f85be6ac46178980de5c 100644 (file)
--- a/include/urcu/lfstack.h
+++ b/include/urcu/lfstack.h
@@ -1,26 +1,12 @@
+// SPDX-FileCopyrightText: 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef _URCU_LFSTACK_H
 #define _URCU_LFSTACK_H
 
 /*
- * lfstack.h
- *
  * Userspace RCU library - Lock-Free Stack
- *
- * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifdef __cplusplus
@@ -29,7 +15,6 @@ extern "C" {
 
 #include <stdbool.h>
 #include <pthread.h>
-#include <urcu/compiler.h>
 
 /*
  * Lock-free stack.
@@ -81,16 +66,27 @@ struct cds_lfs_stack {
 };
 
 /*
- * The transparent union allows calling functions that work on both
- * struct cds_lfs_stack and struct __cds_lfs_stack on any of those two
- * types.
+ * In C, the transparent union allows calling functions that work on
+ * both struct cds_lfs_stack and struct __cds_lfs_stack on any of those
+ * two types.
+ *
+ * In C++, implement static inline wrappers using function overloading
+ * to obtain an API similar to C.
  *
- * Avoid complaints from clang++ not knowing this attribute.
+ * Avoid complaints from clang++ not knowing the transparent union
+ * attribute.
  */
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wignored-attributes"
+#endif
 typedef union {
        struct __cds_lfs_stack *_s;
        struct cds_lfs_stack *s;
-} caa_c_transparent_union cds_lfs_stack_ptr_t;
+} __attribute__((__transparent_union__)) cds_lfs_stack_ptr_t;
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
 
 #ifdef _LGPL_SOURCE
 
@@ -258,6 +254,49 @@ extern struct cds_lfs_head *__cds_lfs_pop_all(cds_lfs_stack_ptr_t s);
 
 #ifdef __cplusplus
 }
-#endif
+
+/*
+ * In C++, implement static inline wrappers using function overloading
+ * to obtain an API similar to C.
+ */
+
+static inline cds_lfs_stack_ptr_t cds_lfs_stack_cast(struct __cds_lfs_stack *s)
+{
+       cds_lfs_stack_ptr_t ret = {
+               ._s = s,
+       };
+       return ret;
+}
+
+static inline cds_lfs_stack_ptr_t cds_lfs_stack_cast(struct cds_lfs_stack *s)
+{
+       cds_lfs_stack_ptr_t ret = {
+               .s = s,
+       };
+       return ret;
+}
+
+template<typename T> static inline bool cds_lfs_empty(T s)
+{
+       return cds_lfs_empty(cds_lfs_stack_cast(s));
+}
+
+template<typename T> static inline bool cds_lfs_push(T s,
+                       struct cds_lfs_node *node)
+{
+       return cds_lfs_push(cds_lfs_stack_cast(s), node);
+}
+
+template<typename T> static inline struct cds_lfs_node *__cds_lfs_pop(T s)
+{
+       return __cds_lfs_pop(cds_lfs_stack_cast(s));
+}
+
+template<typename T> static inline struct cds_lfs_head *__cds_lfs_pop_all(T s)
+{
+       return __cds_lfs_pop_all(cds_lfs_stack_cast(s));
+}
+
+#endif /* __cplusplus */
 
 #endif /* _URCU_LFSTACK_H */