initial import
git-svn-id: https://svn.pjsip.org/repos/pjproject/main@1 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/include/pj/compat/rand.h b/pjlib/include/pj/compat/rand.h
new file mode 100644
index 0000000..31461b3
--- /dev/null
+++ b/pjlib/include/pj/compat/rand.h
@@ -0,0 +1,65 @@
+/* $Header: /pjproject-0.3/pjlib/include/pj/compat/rand.h 3 10/14/05 12:26a Bennylp $ */
+/* $Log: /pjproject-0.3/pjlib/include/pj/compat/rand.h $
+ *
+ * 3 10/14/05 12:26a Bennylp
+ * Finished error code framework, some fixes in ioqueue, etc. Pretty
+ * major.
+ *
+ * 2 9/21/05 1:39p Bennylp
+ * Periodic checkin for backup.
+ *
+ * 1 9/17/05 10:36a Bennylp
+ * Created.
+ *
+ */
+#ifndef __PJ_COMPAT_RAND_H__
+#define __PJ_COMPAT_RAND_H__
+
+/**
+ * @file rand.h
+ * @brief Provides platform_rand() and platform_srand() functions.
+ */
+
+#if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0
+ /*
+ * Use stdlib based rand() and srand().
+ */
+# include <stdlib.h>
+# define platform_srand srand
+# if defined(RAND_MAX) && RAND_MAX <= 0xFFFF
+ /*
+ * When rand() is only 16 bit strong, double the strength
+ * by calling it twice!
+ */
+ PJ_INLINE(int) platform_rand(void)
+ {
+ return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF);
+ }
+# else
+# define platform_rand rand
+# endif
+
+#elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0
+ /*
+ * Linux kernel mode random number generator.
+ */
+# include <linux/random.h>
+# define platform_srand(seed)
+
+ PJ_INLINE(int) platform_rand(void)
+ {
+ int value;
+ get_random_bytes((void*)&value, sizeof(value));
+ return value;
+ }
+
+#else
+# warning "platform_rand() is not implemented"
+# define platform_rand() 1
+# define platform_srand(seed)
+
+#endif
+
+
+#endif /* __PJ_COMPAT_RAND_H__ */
+