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components/libraries/util/sdk_alloca.h

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+/**
+ * Copyright (c) 2017 - 2020, Nordic Semiconductor ASA
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ *
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/** @file sdk_alloca.h
+ *
+ * @brief Defines alloca() function.
+ *
+ * @details This file defines alloca() function. This can be done directly or by including system
+ * header files. Not all platforms support alloca(). In this case no error will be shown, but
+ * SDK_ALLOCA_DEFINED will be set to 0.
+ */
+
+#ifndef SDK_ALLOCA_H__
+#define SDK_ALLOCA_H__
+
+
+#if defined(__SDK_DOXYGEN__)
+    /** @brief Set to one it alloca() function is available on this platform and it is correctly defined
+     *  by this header file.
+     */
+    #define SDK_ALLOCA_DEFINED 1
+#elif defined(__GNUC__)
+    #if defined(__SES_ARM)
+        // SES does not have definition of alloca(), but it have working GCC's __builtin_alloca().
+        #if !defined(alloca)
+            #define alloca(size) __builtin_alloca((size))
+        #endif
+    #else
+        // alloca() can be defined in <malloc.h> on some platforms, but if not then try standard <alloca.h> header file.
+        #include <malloc.h>
+        #if !defined(alloca)
+            #include <alloca.h>
+        #endif
+    #endif
+    #define SDK_ALLOCA_DEFINED 1
+#elif defined(__IAR_SYSTEMS_ICC__)
+    // IAR does not support alloca() function.
+    #define SDK_ALLOCA_DEFINED 0
+#else
+    // All other supported compilers have alloca() definition in <alloca.h> header file.
+    #include <alloca.h>
+    #define SDK_ALLOCA_DEFINED 1
+#endif
+
+
+/*lint -"d__builtin_alloca=(void*)" */
+
+
+#endif // NRF_ALLOCA_H__