diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 84 |
1 files changed, 74 insertions, 10 deletions
@@ -15,6 +15,7 @@ #include "path.h" #include "sha1-array.h" #include "repository.h" +#include "mem-pool.h" #include <zlib.h> typedef struct git_zstream { @@ -156,6 +157,7 @@ struct cache_entry { struct stat_data ce_stat_data; unsigned int ce_mode; unsigned int ce_flags; + unsigned int mem_pool_allocated; unsigned int ce_namelen; unsigned int index; /* for link extension */ struct object_id oid; @@ -218,6 +220,7 @@ struct cache_entry { /* Forward structure decls */ struct pathspec; struct child_process; +struct tree; /* * Copy the sha1 and stat state of a cache entry from one to @@ -227,6 +230,7 @@ static inline void copy_cache_entry(struct cache_entry *dst, const struct cache_entry *src) { unsigned int state = dst->ce_flags & CE_HASHED; + int mem_pool_allocated = dst->mem_pool_allocated; /* Don't copy hash chain and name */ memcpy(&dst->ce_stat_data, &src->ce_stat_data, @@ -235,6 +239,9 @@ static inline void copy_cache_entry(struct cache_entry *dst, /* Restore the hash state */ dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; + + /* Restore the mem_pool_allocated flag */ + dst->mem_pool_allocated = mem_pool_allocated; } static inline unsigned create_ce_flags(unsigned stage) @@ -328,6 +335,7 @@ struct index_state { struct untracked_cache *untracked; uint64_t fsmonitor_last_update; struct ewah_bitmap *fsmonitor_dirty; + struct mem_pool *ce_mem_pool; }; extern struct index_state the_index; @@ -339,6 +347,60 @@ extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce) extern void free_name_hash(struct index_state *istate); +/* Cache entry creation and cleanup */ + +/* + * Create cache_entry intended for use in the specified index. Caller + * is responsible for discarding the cache_entry with + * `discard_cache_entry`. + */ +struct cache_entry *make_cache_entry(struct index_state *istate, + unsigned int mode, + const struct object_id *oid, + const char *path, + int stage, + unsigned int refresh_options); + +struct cache_entry *make_empty_cache_entry(struct index_state *istate, + size_t name_len); + +/* + * Create a cache_entry that is not intended to be added to an index. + * Caller is responsible for discarding the cache_entry + * with `discard_cache_entry`. + */ +struct cache_entry *make_transient_cache_entry(unsigned int mode, + const struct object_id *oid, + const char *path, + int stage); + +struct cache_entry *make_empty_transient_cache_entry(size_t name_len); + +/* + * Discard cache entry. + */ +void discard_cache_entry(struct cache_entry *ce); + +/* + * Check configuration if we should perform extra validation on cache + * entries. + */ +int should_validate_cache_entries(void); + +/* + * Duplicate a cache_entry. Allocate memory for the new entry from a + * memory_pool. Takes into account cache_entry fields that are meant + * for managing the underlying memory allocation of the cache_entry. + */ +struct cache_entry *dup_cache_entry(const struct cache_entry *ce, struct index_state *istate); + +/* + * Validate the cache entries in the index. This is an internal + * consistency check that the cache_entry structs are allocated from + * the expected memory pool. + */ +void validate_cache_entries(const struct index_state *istate); + #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS #define active_cache (the_index.cache) #define active_nr (the_index.cache_nr) @@ -635,12 +697,15 @@ extern void move_index_extensions(struct index_state *dst, struct index_state *s extern int unmerged_index(const struct index_state *); /** - * Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn - * branch, returns 1 if there are entries in the index, 0 otherwise. If an - * strbuf is provided, the space-separated list of files that differ will be - * appended to it. + * Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL, + * compares istate to HEAD. If tree is NULL and on an unborn branch, + * returns 1 if there are entries in istate, 0 otherwise. If an strbuf is + * provided, the space-separated list of files that differ will be appended + * to it. */ -extern int index_has_changes(struct strbuf *sb); +extern int index_has_changes(const struct index_state *istate, + struct tree *tree, + struct strbuf *sb); extern int verify_path(const char *path, unsigned mode); extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change); @@ -698,7 +763,6 @@ extern int remove_file_from_index(struct index_state *, const char *path); extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags); extern int add_file_to_index(struct index_state *, const char *path, int flags); -extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, unsigned int refresh_options); extern int chmod_index_entry(struct index_state *, struct cache_entry *ce, char flip); extern int ce_same_name(const struct cache_entry *a, const struct cache_entry *b); extern void set_object_name_for_intent_to_add_entry(struct cache_entry *ce); @@ -751,7 +815,7 @@ extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); #define REFRESH_IGNORE_SUBMODULES 0x0010 /* ignore submodules */ #define REFRESH_IN_PORCELAIN 0x0020 /* user friendly output, not "needs update" */ extern int refresh_index(struct index_state *, unsigned int flags, const struct pathspec *pathspec, char *seen, const char *header_msg); -extern struct cache_entry *refresh_cache_entry(struct cache_entry *, unsigned int); +extern struct cache_entry *refresh_cache_entry(struct index_state *, struct cache_entry *, unsigned int); /* * Opportunistically update the index but do not complain if we can't. @@ -971,7 +1035,7 @@ extern const struct object_id null_oid; static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) { - return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); + return memcmp(sha1, sha2, the_hash_algo->rawsz); } static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) @@ -991,7 +1055,7 @@ static inline int is_null_oid(const struct object_id *oid) static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) { - memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); + memcpy(sha_dst, sha_src, the_hash_algo->rawsz); } static inline void oidcpy(struct object_id *dst, const struct object_id *src) @@ -1008,7 +1072,7 @@ static inline struct object_id *oiddup(const struct object_id *src) static inline void hashclr(unsigned char *hash) { - memset(hash, 0, GIT_SHA1_RAWSZ); + memset(hash, 0, the_hash_algo->rawsz); } static inline void oidclr(struct object_id *oid) |