Mon 16 Mar 11:09:06 CET 2026

src/mem.h

@@ -0,0 +1,55 @@
+#ifndef _MEM_H
+#define _MEM_H
+
+/*
+ Code segment occupied by a task, required for cleanup on task end and code memory partitioning.
+ Forked tasks inherit segment from parent task.
+ A task can use more than one segment, e.g., there is only one context (task)
+ which handles the main programm and single line statements modifying the state of the task (and heap).
+*/
+typedef struct {
+  int8_t    used;
+  address_t bottom;     // start
+  address_t top;        // end
+  index_t   refcount;  // contains function and procedures referenced by heap; 
+                       // no disposal of segment allowed if > 0 
+#if PROFILE>0
+  index_t   ntoken;
+  unsigned long micros;
+#endif
+} segment_t;
+
+
+/*
+  Shared data and code memory
+  -------
+  heap |
+       v
+       
+       ^
+  code |
+  -----.     
+*/
+
+typedef struct {
+  unsigned char *data;    // entire heap
+  int           size;
+  int           top;      // top of heap, growing down
+  int           bottom;   // top of code, growing up
+  segment_t     segments[MAXTASKS]; // parts of the heap
+  segment_t     *segment; // current segment (used by code compiler)
+} mem_t;
+
+
+#define ADDRESS(M,addr)  *(address_t*)(&M->data[addr])
+#define CHAR(M,addr)      M->data[addr]
+#define INDEX(M,addr)    *(index_t*)(&M->data[addr])
+#define NUMBER(M,addr)   *(number_t*)(&M->data[addr])
+#define CHECKHEAP(M,addr) (addr>M->top && addr<M->size)
+
+void MemInit(mem_t *M,int size,unsigned char *data);
+void MemReset(mem_t *M);
+segment_t *AllocSegment(mem_t *M);
+int ReleaseSegment(mem_t *M, segment_t *S);
+
+#endif