add build system using Core Library

lib/core/include/core_index.h

@@ -0,0 +1,67 @@
+#ifndef __CORE_INDEX_H__
+#define __CORE_INDEX_H__
+
+#include "core.h"
+#include "core_mutex.h"
+
+#define INVALID_INDEX 0
+
+#define index_declare(__name, __size) \
+    typedef struct { \
+        int head, tail; \
+        int size, avail; \
+        c_uint32_t free_index[__size]; \
+        mutex_id mut; \
+    } index_##__name##_t; \
+    index_##__name##_t __name
+
+#define index_init(__pname, __size) do { \
+    int __i; \
+    mutex_create(&(__pname)->mut, MUTEX_DEFAULT); \
+    (__pname)->size = (__pname)->avail = __size; \
+    (__pname)->head = (__pname)->tail = 0; \
+    for (__i = 0; __i < __size; __i++) \
+        (__pname)->free_index[__i] = (__i + 1); \
+} while (0)
+
+#define index_final(__pname) \
+    ((__pname)->mut ? mutex_delete((__pname)->mut) : CORE_OK)
+
+#define index_init_wo_lock(__pname, __size) do { \
+    int __i; \
+    (__pname)->mut = 0; \
+    (__pname)->size = (__pname)->avail = __size; \
+    (__pname)->head = (__pname)->tail = 0; \
+    for (__i = 0; __i < __size; __i++) \
+        (__pname)->free_index[__i] = (__i + 1); \
+} while (0)
+
+#define index_alloc(__pname, __index) do { \
+    (__index) = INVALID_INDEX; \
+    if ((__pname)->mut) mutex_lock((__pname)->mut); \
+    if ((__pname)->avail > 0) { \
+         (__pname)->avail--; \
+         (__index) = (__pname)->free_index[(__pname)->head]; \
+         (__pname)->free_index[(__pname)->head] = INVALID_INDEX; \
+         (__pname)->head = ((__pname)->head + 1) % ((__pname)->size); \
+    } \
+    if ((__pname)->mut) mutex_unlock((__pname)->mut); \
+} while (0)
+
+#define index_free(__pname, __index) do { \
+    if ((__pname)->mut) mutex_lock((__pname)->mut); \
+    if ((__pname)->avail < (__pname)->size) { \
+        (__pname)->avail++; \
+        (__pname)->free_index[(__pname)->tail] = (__index); \
+        (__pname)->tail = ((__pname)->tail + 1) % ((__pname)->size); \
+    } \
+    if ((__pname)->mut) mutex_unlock((__pname)->mut); \
+} while (0)
+
+#define index_size(__pname) ((__pname)->size)
+
+#define index_avail(__pname) ((__pname)->avail)
+
+#define index_used(__pname) (index_size(__pname) - index_avail(__pname))
+
+#endif /* ! __CORE_INDEX_H__ */