Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/nsgmls/Allocator.h

@@ -0,0 +1,68 @@
+/* $XConsortium: Allocator.h /main/1 1996/07/29 16:46:04 cde-hp $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef Allocator_INCLUDED
+#define Allocator_INCLUDED 1
+
+#include <stddef.h>
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+class SP_API Allocator {
+public:
+  Allocator(size_t maxSize, unsigned blocksPerSegment);
+  ~Allocator();
+  void *alloc(size_t);
+  static void *allocSimple(size_t);
+  static void free(void *);
+
+  // It would be nice to make these private, but some compilers have problems.
+  union ForceAlign {
+    unsigned long n;
+    struct SP_API {
+      char c;
+    } s;
+    char *cp;
+    long *lp;
+  };
+  struct SegmentHeader;
+  union BlockHeader;
+  friend union BlockHeader;
+  union BlockHeader {
+    SegmentHeader *seg;
+    ForceAlign align;
+  };
+  struct Block;
+  friend struct Block;
+  struct SP_API Block {
+    BlockHeader header;
+    Block *next;
+  };
+  friend struct SegmentHeader;
+  struct SP_API SegmentHeader {
+    union {
+      Block **freeList;
+      ForceAlign align;
+    };
+    unsigned liveCount;
+    SegmentHeader *next;
+  };
+private:
+  Allocator(const Allocator &);	// undefined
+  Allocator &operator=(const Allocator &); // undefined
+  Block *freeList_;
+  size_t objectSize_;
+  unsigned blocksPerSegment_;
+  SegmentHeader *segments_;
+  void *alloc1();
+  void tooBig(size_t);
+};
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not Allocator_INCLUDED */