Changeset 3457 for trunk/src/kash/shinstance.h

Timestamp:

Sep 14, 2020, 7:34:28 PM (5 years ago)

Author:

bird

Message:

kash: New parser allocator for non-forked-mode.

File:

• trunk/src/kash/shinstance.h (modified) (2 diffs)

trunk/src/kash/shinstance.h

@@ -84 +84 @@
         char space[MINSIZE];
 };
+
+#ifdef KASH_SEPARATE_PARSER_ALLOCATOR
+/** Parser stack allocator block.
+ * These are reference counted so they can be shared between the parent and
+ * child shells.  They are also using as an alternative to copying function
+ * definitions, here the final goal is to automatically emit separate
+ * pstack_blocks for function while parsing to make it more flexible. */
+typedef struct pstack_block {
+    /** Pointer to the next unallocated byte (= stacknxt). */
+    char               *nextbyte;
+    /** Number of bytes available in the current stack block (= stacknleft). */
+    size_t              avail;
+    /* Number of chars left for string data (PSTPUTC, PSTUPUTC, et al) (= sstrnleft). */
+    size_t              strleft;
+    /** Top of the allocation stack (nextbyte points within this). */
+    struct stack_block *top;
+    /** Size of the top stack element (user space only). */
+    size_t              topsize;
+    /** @name statistics
+     * @{ */
+    size_t              allocations;
+    size_t              bytesalloced;
+    size_t              nodesalloced;
+    size_t              entriesalloced;
+    size_t              strbytesalloced;
+    size_t              blocks;
+    size_t              fragmentation;
+    /** @} */
+    /** Reference counter. */
+    unsigned volatile   refs;
+    unsigned            padding;
+    /** The first stack block. */
+    struct stack_block  first;
+} pstack_block;
+#endif
 
 /* input.c */
@@ -275 +310 @@
     struct stack_block *stackp/* = &stackbase*/;
     struct stackmark   *markp;
+
+#ifdef KASH_SEPARATE_PARSER_ALLOCATOR
+    pstack_block       *curpstack;      /**< The pstack entry we're currently allocating from (NULL when not in parse.c). */
+    pstack_block      **pstack;         /**< Stack of parsed stuff. */
+    unsigned            pstacksize;     /**< Number of entries in pstack. */
+    unsigned            pstackalloced;  /**< The allocated size of pstack. */
+#endif
 
     /* myhistedit.h */