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First phase of memory management rewrite (see backend/utils/mmgr/README

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for details).  It doesn't really do that much yet, since there are no
short-term memory contexts in the executor, but the infrastructure is
in place and long-term contexts are handled reasonably.  A few long-
standing bugs have been fixed, such as 'VACUUM; anything' in a single
query string crashing.  Also, out-of-memory is now considered a
recoverable ERROR, not FATAL.
Eliminate a large amount of crufty, now-dead code in and around
memory management.
Fix problem with holding off SIGTRAP, SIGSEGV, etc in postmaster and
backend startup.
This commit is contained in:
Tom Lane
2000-06-28 03:33:33 +00:00
parent b601c8d882
commit 1aebc3618a
74 changed files with 2325 additions and 3296 deletions
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115
src/include/lib/fstack.h
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@@ -1,115 +0,0 @@
/*-------------------------------------------------------------------------
*
* fstack.h
* Fixed format stack definitions.
*
*
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: fstack.h,v 1.9 2000/01/26 05:58:09 momjian Exp $
*
*-------------------------------------------------------------------------
*/
/*
* Note:
* Fixed format stacks assist in the construction of FIFO stacks of
* fixed format structures. Structures which are to be stackable
* should contain a FixedItemData component. A stack is initilized
* with the offset of the FixedItemData component of the structure
* it will hold. By doing so, push and pop operations are simplified
* for the callers. All references to stackable items are pointers
* to the base of the structure instead of pointers to the
* FixedItemData component.
*
*/
#ifndef FSTACK_H
#define FSTACK_H
/*
* FixedItem
* Fixed format stackable item chain component.
*
* Note:
* Structures must contain one FixedItemData component per stack in
* which it will be an item.
*/
typedef struct FixedItemData FixedItemData;
typedef FixedItemData *FixedItem;
struct FixedItemData
{
FixedItem next; /* next item or NULL */
};
/*
* FixedStack
* Fixed format stack.
*/
typedef struct FixedStackData
{
FixedItem top; /* Top item on the stack or NULL */
Offset offset; /* Offset from struct base to item */
/* this could be signed short int! */
} FixedStackData;
typedef FixedStackData *FixedStack;
/*
* FixedStackInit
* Iniitializes stack for structures with given fixed component offset.
*
* Exceptions:
* BadArg if stack is invalid pointer.
*/
extern void FixedStackInit(FixedStack stack, Offset offset);
/*
* FixedStackPop
* Returns pointer to top structure on stack or NULL if empty stack.
*
* Exceptions:
* BadArg if stack is invalid.
*/
Pointer FixedStackPop(FixedStack stack);
/*
* FixedStackPush
* Places structure associated with pointer onto top of stack.
*
* Exceptions:
* BadArg if stack is invalid.
* BadArg if pointer is invalid.
*/
extern void FixedStackPush(FixedStack stack, Pointer pointer);
/*
* FixedStackGetTop
* Returns pointer to top structure of a stack. This item is not poped.
*
* Note:
* This is not part of the normal stack interface. It is intended for
* debugging use only.
*
* Exceptions:
* BadArg if stack is invalid.
*/
extern Pointer FixedStackGetTop(FixedStack stack);
/*
* FixedStackGetNext
* Returns pointer to next structure after pointer of a stack.
*
* Note:
* This is not part of the normal stack interface. It is intended for
* debugging use only.
*
* Exceptions:
* BadArg if stack is invalid.
* BadArg if pointer is invalid.
* BadArg if stack does not contain pointer.
*/
extern Pointer FixedStackGetNext(FixedStack stack, Pointer pointer);
#endif /* FSTACK_H */