First version of #25 implementation, providing memory_get_usage/memory_get_peak_usage/memory_limit

include/ph7.h

@@ -107,7 +107,10 @@ typedef struct ph7_context ph7_context;
 typedef struct ph7_value ph7_value;
 typedef struct ph7_vfs ph7_vfs;
 typedef struct ph7_vm ph7_vm;
+typedef struct ph7_heap ph7_heap;
 typedef struct ph7 ph7;
+
+typedef struct SyMemBackend	  SyMemBackend;
 /*
  * ------------------------------
  * Compile time directives
@@ -267,9 +270,9 @@ struct Sytm {
 
 /* Dynamic memory allocation methods. */
 struct SyMemMethods {
-	void *(*xAlloc)(unsigned int);           /* [Required:] Allocate a memory chunk */
-	void *(*xRealloc)(void *, unsigned int); /* [Required:] Re-allocate a memory chunk */
-	void (*xFree)(void *);                   /* [Required:] Release a memory chunk */
+	void *(*xAlloc)(unsigned int, SyMemBackend *);           /* [Required:] Allocate a memory chunk */
+	void *(*xRealloc)(void *, unsigned int, SyMemBackend *); /* [Required:] Re-allocate a memory chunk */
+	void (*xFree)(void *, SyMemBackend *);                   /* [Required:] Release a memory chunk */
 	unsigned int (*xChunkSize)(void *);      /* [Optional:] Return chunk size */
 	int (*xInit)(void *);                    /* [Optional:] Initialization callback */
 	void (*xRelease)(void *);                /* [Optional:] Release callback */
@@ -370,6 +373,7 @@ typedef sxi64 ph7_int64;
 #define PH7_CONFIG_ERR_OUTPUT    1  /* TWO ARGUMENTS: int (*xConsumer)(const void *pOut,unsigned int nLen,void *pUserData),void *pUserData */
 #define PH7_CONFIG_ERR_ABORT     2  /* RESERVED FOR FUTURE USE */
 #define PH7_CONFIG_ERR_LOG       3  /* TWO ARGUMENTS: const char **pzBuf,int *pLen */
+#define PH7_CONFIG_MEM_LIMIT	 4  /* ONE ARGUMENT: char *iMaxLimit */
 /*
  * Virtual Machine Configuration Commands.
  *
@@ -597,6 +601,13 @@ struct ph7_io_stream {
 	int (*xSync)(void *);                                  /* Flush open stream data */
 	int (*xStat)(void *, ph7_value *, ph7_value *);        /* Stat an open stream handle */
 };
+
+struct ph7_heap {
+	ph7_vm *pVm;	    /* Reference to active VM */
+	sxu64 nBytes;       /* Actually allocated */
+	sxu64 iPeak;        /* As its peak */
+	sxu64 iMax;         /* Max allowed */
+};
 /*
  * C-API-REF: Please refer to the official documentation for interfaces
  * purpose and expected parameters.

include/ph7int.h

@@ -145,7 +145,6 @@ typedef sxi32(*ProcRawStrCmp)(const SyString *, const SyString *);
 #define SXUNUSED(P)	(P = 0)
 #define	SX_EMPTY(PTR)   (PTR == 0)
 #define SX_EMPTY_STR(STR) (STR == 0 || STR[0] == 0 )
-typedef struct SyMemBackend SyMemBackend;
 typedef struct SyBlob SyBlob;
 typedef struct SySet SySet;
 /* Standard function signatures */
@@ -241,6 +240,7 @@ union SyMemHeader {
 struct SyMemBackend {
 	const SyMutexMethods *pMutexMethods; /* Mutex methods */
 	const SyMemMethods *pMethods;  /* Memory allocation methods */
+	ph7_heap pHeap;		       /* Heap infos */
 	SyMemBlock *pBlocks;           /* List of valid memory blocks */
 	sxu32 nBlock;                  /* Total number of memory blocks allocated so far */
 	ProcMemError xMemError;        /* Out-of memory callback */
@@ -1025,7 +1025,7 @@ typedef struct ph7_class_method ph7_class_method;
 typedef struct ph7_class_attr   ph7_class_attr;
 /*
  * Information about class/interface inheritance and interface implementation
- * is stored in an instance of the following structure. 
+ * is stored in an instance of the following structure.
  */
 struct ph7_class_info {
 	SyString sName;       /* Class full qualified name */
@@ -1832,6 +1832,7 @@ PH7_PRIVATE void *SyMemBackendAlloc(SyMemBackend *pBackend, sxu32 nByte);
 PH7_PRIVATE sxu32 SyMemcpy(const void *pSrc, void *pDest, sxu32 nLen);
 PH7_PRIVATE sxi32 SyMemcmp(const void *pB1, const void *pB2, sxu32 nSize);
 PH7_PRIVATE void SyZero(void *pSrc, sxu32 nSize);
+PH7_PRIVATE sxu32 Systrcpy(char *zDest, sxu32 nDestLen, const char *zSrc, sxu32 nLen);
 PH7_PRIVATE sxi32 SyStrnicmp(const char *zLeft, const char *zRight, sxu32 SLen);
 PH7_PRIVATE sxi32 SyStrnmicmp(const void *pLeft, const void *pRight, sxu32 SLen);
 #ifndef PH7_DISABLE_BUILTIN_FUNC