diff options
Diffstat (limited to 'gcc/ggc.h')
| -rw-r--r-- | gcc/ggc.h | 69 |
1 files changed, 48 insertions, 21 deletions
@@ -31,27 +31,63 @@ extern int ggc_p; compiler. However, rather than force everyone who includes this header to include all the headers in which they are declared, we just forward-declare them here. */ -struct label_node; struct eh_status; struct emit_status; +struct hash_table; +struct label_node; +struct rtvec_def; struct stmt_status; +union tree_node; struct varasm_status; struct varray_head_tag; -struct hash_table; -/* Startup */ +/* Global roots that are preserved during calls to gc. */ + +struct ggc_root +{ + struct ggc_root *next; + void *base; + int nelt; + int size; + void (*cb) PROTO ((void *)); +}; + +extern struct ggc_root *roots; + +/* Manipulate global roots that are needed between calls to gc. */ +void ggc_add_root PROTO ((void *base, int nelt, int size, void (*)(void *))); +void ggc_add_rtx_root PROTO ((struct rtx_def **, int nelt)); +void ggc_add_tree_root PROTO ((union tree_node **, int nelt)); +void ggc_add_string_root PROTO ((char **, int nelt)); +void ggc_add_tree_varray_root PROTO ((struct varray_head_tag **, int nelt)); +void ggc_add_tree_hash_table_root PROTO ((struct hash_table **, int nelt)); +void ggc_del_root PROTO ((void *base)); +/* Mark nodes from the gc_add_root callback. These functions follow + pointers to mark other objects too. */ +void ggc_mark_rtx PROTO ((struct rtx_def *)); +void ggc_mark_rtvec PROTO ((struct rtvec_def *)); +void ggc_mark_tree PROTO ((union tree_node *)); +void ggc_mark_tree_varray PROTO ((struct varray_head_tag *)); +void ggc_mark_tree_hash_table PROTO ((struct hash_table *)); +void ggc_mark_string PROTO ((char *)); +void ggc_mark PROTO ((void *)); + + +/* A GC implementation must provide these functions. */ + +/* Initialize the garbage collector. */ extern void init_ggc PROTO ((void)); /* Start a new GGC context. Memory allocated in previous contexts will not be collected while the new context is active. */ extern void ggc_pop_context PROTO ((void)); + /* Finish a GC context. Any uncollected memory in the new context will be merged with the old context. */ extern void ggc_push_context PROTO ((void)); /* Allocation. */ - struct rtx_def *ggc_alloc_rtx PROTO ((int nslots)); struct rtvec_def *ggc_alloc_rtvec PROTO ((int nelt)); union tree_node *ggc_alloc_tree PROTO ((int length)); @@ -60,26 +96,17 @@ void *ggc_alloc PROTO ((size_t)); /* Invoke the collector. This is really just a hint, but in the case of the simple collector, the only time it will happen. */ - void ggc_collect PROTO ((void)); -/* Manipulate global roots that are needed between calls to gc. */ -void ggc_add_root PROTO ((void *base, int nelt, int size, void (*)(void *))); -void ggc_add_rtx_root PROTO ((struct rtx_def **, int nelt)); -void ggc_add_tree_root PROTO ((union tree_node **, int nelt)); -void ggc_add_string_root PROTO ((char **, int nelt)); -void ggc_add_tree_varray_root PROTO ((struct varray_head_tag **, int nelt)); -void ggc_add_tree_hash_table_root PROTO ((struct hash_table **, int nelt)); -void ggc_del_root PROTO ((void *base)); +/* Actually set the mark on a particular region of memory, but don't + follow pointers. These functions are called by ggc_mark_*. They + return zero if the object was not previously marked; they return + non-zero if the object was already marked, or if, for any other + reason, pointers in this data structure should not be traversed. */ +int ggc_set_mark_rtx PROTO ((struct rtx_def *)); +int ggc_set_mark_rtvec PROTO ((struct rtvec_def *)); +int ggc_set_mark_tree PROTO ((union tree_node *)); -/* Mark nodes from the gc_add_root callback. */ -void ggc_mark_rtx PROTO ((struct rtx_def *)); -void ggc_mark_rtvec PROTO ((struct rtvec_def *)); -void ggc_mark_tree PROTO ((union tree_node *)); -void ggc_mark_tree_varray PROTO ((struct varray_head_tag *)); -void ggc_mark_tree_hash_table PROTO ((struct hash_table *)); -void ggc_mark_string PROTO ((char *)); -void ggc_mark PROTO ((void *)); /* Callbacks to the languages. */ |