first commit

lib/memalign.h

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+/**
+ *  Copyright (C) 2011-2012  Juho Vähä-Herttua
+ *
+ *  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.
+ */
+
+#ifndef MEMALIGN_H
+#define MEMALIGN_H
+
+#if defined(WIN32)
+
+#define SYSTEM_GET_PAGESIZE(ret) do {\
+	SYSTEM_INFO si;\
+	GetSystemInfo(&si);\
+	ret = si.dwPageSize;\
+} while(0)
+#define SYSTEM_GET_TIME(ret) ret = timeGetTime()
+
+#define ALIGNED_MALLOC(memptr, alignment, size) do {\
+	char *ptr = malloc(sizeof(void*) + (size) + (alignment)-1);\
+	memptr = NULL;\
+	if (ptr) {\
+		size_t ptrval = (size_t)ptr + sizeof(void*) + (alignment)-1;\
+		ptrval = ptrval / (alignment) * (alignment);\
+		memptr = (void *)ptrval;\
+		*(((void **)memptr)-1) = ptr;\
+	}\
+} while(0)
+#define ALIGNED_FREE(memptr) free(*(((void **)memptr)-1))
+
+#else
+
+#define SYSTEM_GET_PAGESIZE(ret) ret = sysconf(_SC_PAGESIZE)
+#define SYSTEM_GET_TIME(ret) do {\
+    struct timeval tv;\
+    gettimeofday(&tv, NULL);\
+    ret = (unsigned int)(tv.tv_sec*1000 + tv.tv_usec/1000);\
+} while(0)
+
+#define ALIGNED_MALLOC(memptr, alignment, size) if (posix_memalign((void **)&memptr, alignment, size)) memptr = NULL
+#define ALIGNED_FREE(memptr) free(memptr)
+
+#endif
+
+#endif