init: Air780EPM 官方 LuatOS 项目代码基线

- 来源: 合宙 LuatOS 官方仓库 air780epm 模块完整代码 - 路径: luatos/air780epm/module/Air780EPM/demo 含官方 demo(含 mqtt/mqtts/socket/uart 等) - 后续: 基于 demo 开发 UART<->MQTT 数据上报功能
2026-08-31 08:53:49 +08:00
commit 173dd6874f
813 changed files with 125484 additions and 0 deletions
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+/*
+    Interface definitions for luat_bget.c, the memory management package.
+    在原版基础上，改成纯函数实现
+*/
+//#include <assert.h>
+#include <string.h>
+
+typedef long bufsize;
+
+#define MemSize     int               /* Type for size arguments to memxxx()
+                                         functions such as memcmp(). */
+
+#define SizeQuant   8                 /* Buffer allocation size quantum:
+                                         all buffers allocated are a
+                                         multiple of this size.  This
+                                         MUST be a power of two. */
+
+#if 1
+#define BufStats    1                 /* Define this symbol to enable the
+                                         bstats() function which calculates
+                                         the total free space in the buffer
+                                         pool, the largest available
+                                         buffer, and the total space
+                                         currently allocated. */
+#endif
+
+#if 0
+#define FreeWipe    1                 /* Wipe free buffers to a guaranteed
+                                         pattern of garbage to trip up
+                                         miscreants who attempt to use
+                                         pointers into released buffers. */
+#endif
+
+#if 1
+#define BestFit     1                 /* Use a best fit algorithm when
+                                         searching for space for an
+                                         allocation request.  This uses
+                                         memory more efficiently, but
+                                         allocation will be much slower. */
+#endif
+
+
+/* Queue links */
+
+struct qlinks {
+    struct bfhead *flink;             /* Forward link */
+    struct bfhead *blink;             /* Backward link */
+};
+
+/* Header in allocated and free buffers */
+
+struct bhead {
+    bufsize prevfree;                 /* Relative link back to previous
+                                         free buffer in memory or 0 if
+                                         previous buffer is allocated.  */
+    bufsize bsize;                    /* Buffer size: positive if free,
+                                         negative if allocated. */
+};
+#define BH(p)   ((struct bhead *) (p))
+
+/*  Header in directly allocated buffers (by acqfcn) */
+
+struct bdhead {
+    bufsize tsize;                    /* Total size, including overhead */
+    struct bhead bh;                  /* Common header */
+};
+#define BDH(p)  ((struct bdhead *) (p))
+
+/* Header in free buffers */
+
+struct bfhead {
+    struct bhead bh;                  /* Common allocated/free header */
+    struct qlinks ql;                 /* Links on free list */
+};
+#define BFH(p)  ((struct bfhead *) (p))
+
+// static struct bfhead freelist = {     /* List of free buffers */
+//     {0, 0},
+//     {&freelist, &freelist}
+// };
+
+typedef struct luat_bget
+{
+#ifdef BufStats
+    bufsize totalloc;          /* Total space currently allocated */
+    bufsize maxalloc;
+    unsigned long numget;
+    unsigned long numrel;   /* Number of bget() and brel() calls */
+#endif /* BufStats */
+    struct bfhead freelist;
+}luat_bget_t;
+
+void luat_bget_init(luat_bget_t* bg);
+void luat_bpool(luat_bget_t* bg, void *buffer, bufsize len);
+void *luat_bget(luat_bget_t* bg, bufsize size);
+void *luat_bgetz(luat_bget_t* bg, bufsize size);
+void *luat_bgetr(luat_bget_t* bg, void *buffer, bufsize newsize);
+void luat_brel(luat_bget_t* bg, void *buf);
+// void luat_bectl(luat_bget_t* bg, int (*compact)(bufsize sizereq, int sequence), void *(*acquire)(bufsize size), void (*release)(void *buf), bufsize pool_incr);
+void luat_bstats(luat_bget_t* bg, bufsize *curalloc, bufsize *totfree, bufsize *maxfree, unsigned long  *nget, unsigned long *nrel);
+// void luat_bstatse(luat_bget_t* bg, bufsize *pool_incr, long *npool, unsigned long *npget, unsigned long *nprel, unsigned long *ndget, unsigned long *ndrel);
+// void luat_bufdump(luat_bget_t* bg, void *buf);
+// void luat_bpoold(luat_bget_t* bg, void *pool, int dumpalloc, int dumpfree);
+// int luat_bpoolv(luat_bget_t* bg, void *pool);
+bufsize luat_bstatsmaxget(luat_bget_t* bg);