Initial creation of sourceware repository

gdb/osf-share/cma_stack_int.h

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+/* 
+ * (c) Copyright 1990-1996 OPEN SOFTWARE FOUNDATION, INC.
+ * (c) Copyright 1990-1996 HEWLETT-PACKARD COMPANY
+ * (c) Copyright 1990-1996 DIGITAL EQUIPMENT CORPORATION
+ * (c) Copyright 1991, 1992 Siemens-Nixdorf Information Systems
+ * To anyone who acknowledges that this file is provided "AS IS" without
+ * any express or implied warranty: permission to use, copy, modify, and
+ * distribute this file for any purpose is hereby granted without fee,
+ * provided that the above copyright notices and this notice appears in
+ * all source code copies, and that none of the names listed above be used
+ * in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  None of these organizations
+ * makes any representations about the suitability of this software for
+ * any purpose.
+ */
+/*
+ *	Header file for stack management (internal to cma_stack.c, but
+ *	separate for convenience, and unit testing).
+ */
+
+#ifndef CMA_STACK_INT
+#define CMA_STACK_INT
+
+/*
+ *  INCLUDE FILES
+ */
+
+#include <cma.h>
+#include <cma_queue.h>
+#include <cma_list.h>
+#include <cma_tcb_defs.h>
+
+/*
+ * CONSTANTS AND MACROS
+ */
+
+#define cma___c_first_free_chunk	0
+#define cma___c_min_count	2	/* Smallest number of chunks to leave */
+#define cma___c_end		(-1)	/* End of free list (flag) */
+#define cma__c_yellow_size	0
+
+/* 
+ * Cluster types
+ */
+#define cma___c_cluster  0	/* Default cluster */
+#define cma___c_bigstack 1	/* Looks like a cluster, but it's a stack */
+
+
+#define cma___c_null_cluster	(cma___t_cluster *)cma_c_null_ptr
+
+
+/*
+ * TYPEDEFS
+ */
+
+#ifndef __STDC__
+struct CMA__T_INT_STACK;
+#endif
+
+typedef cma_t_natural	cma___t_index;	/* Type for chunk index */
+
+typedef struct CMA___T_CLU_DESC {
+    cma__t_list		list;		/* Queue element for cluster list */
+    cma_t_integer	type;		/* Type of cluster */
+    cma_t_address	stacks;
+    cma_t_address	limit;
+    } cma___t_clu_desc;
+
+typedef union CMA___T_MAP_ENTRY {
+    struct {
+	cma__t_int_tcb	*tcb;		/* TCB associated with stack chunk */
+	struct CMA__T_INT_STACK	*stack;	/* Stack desc. ass. with stack chunk */
+	} mapped;
+    struct {
+	cma___t_index		size;	/* Number of chunks in block */
+	cma___t_index		next;	/* Next free block */
+	} free;
+    } cma___t_map_entry;
+
+/*
+ * NOTE: It is VERY IMPORTANT that both cma___t_cluster and cma___t_bigstack
+ * begin with the cma___t_clu_desc structure, as there is some code in the
+ * stack manager that relies on being able to treat both as equivalent!
+ */
+typedef struct CMA___T_CLUSTER {
+    cma___t_clu_desc	desc;		/* Describe this cluster */
+    cma___t_map_entry	map[cma__c_chunk_count];	/* thread map */
+    cma___t_index	free;		/* First free chunk index */
+    } cma___t_cluster;
+
+/*
+ * NOTE: It is VERY IMPORTANT that both cma___t_cluster and cma___t_bigstack
+ * begin with the cma___t_clu_desc structure, as there is some code in the
+ * stack manager that relies on being able to treat both as equivalent!
+ */
+typedef struct CMA___T_BIGSTACK {
+    cma___t_clu_desc	desc;		/* Describe this cluster */
+    cma__t_int_tcb	*tcb;		/* TCB associated with stack */
+    struct CMA__T_INT_STACK	*stack;	/* Stack desc. ass. with stack */
+    cma_t_natural	size;		/* Size of big stack */
+    cma_t_boolean	in_use;		/* Set if allocated */
+    } cma___t_bigstack;
+
+#if _CMA_PROTECT_MEMORY_
+typedef struct CMA___T_INT_HOLE {
+    cma__t_queue	link;		/* Link holes together */
+    cma_t_boolean	protected;	/* Set when pages are protected */
+    cma_t_address	first;		/* First protected byte */
+    cma_t_address	last;		/* Last protected byte */
+    } cma___t_int_hole;
+#endif
+
+typedef struct CMA__T_INT_STACK {
+    cma__t_object	header;		/* Common header (sequence, type info */
+    cma__t_int_attr	*attributes;	/* Backpointer to attr obj */
+    cma___t_cluster	*cluster;	/* Stack's cluster */
+    cma_t_address	stack_base;	/* base address of stack */
+    cma_t_address	yellow_zone;	/* first address of yellow zone */
+    cma_t_address	last_guard;	/* last address of guard pages */
+    cma_t_natural	first_chunk;	/* First chunk allocated */
+    cma_t_natural	chunk_count;	/* Count of chunks allocated */
+    cma__t_int_tcb	*tcb;		/* TCB backpointer */
+#if _CMA_PROTECT_MEMORY_
+    cma___t_int_hole	hole;		/* Description of hole */
+#endif
+    } cma__t_int_stack;
+
+/*
+ *  GLOBAL DATA
+ */
+
+/*
+ * INTERNAL INTERFACES
+ */
+
+#endif