diff options
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 191 |
1 files changed, 99 insertions, 92 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. @@ -804,16 +868,13 @@ void reset_shared_repository(void); * Do replace refs need to be checked this run? This variable is * initialized to true unless --no-replace-object is used or * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some - * commands that do not want replace references to be active. As an - * optimization it is also set to false if replace references have - * been sought but there were none. + * commands that do not want replace references to be active. */ -extern int check_replace_refs; +extern int read_replace_refs; extern char *git_replace_ref_base; extern int fsync_object_files; extern int core_preload_index; -extern int core_commit_graph; extern int core_apply_sparse_checkout; extern int precomposed_unicode; extern int protect_hfs; @@ -856,15 +917,6 @@ enum log_refs_config { }; extern enum log_refs_config log_all_ref_updates; -enum branch_track { - BRANCH_TRACK_UNSPECIFIED = -1, - BRANCH_TRACK_NEVER = 0, - BRANCH_TRACK_REMOTE, - BRANCH_TRACK_ALWAYS, - BRANCH_TRACK_EXPLICIT, - BRANCH_TRACK_OVERRIDE -}; - enum rebase_setup_type { AUTOREBASE_NEVER = 0, AUTOREBASE_LOCAL, @@ -881,7 +933,6 @@ enum push_default_type { PUSH_DEFAULT_UNSPECIFIED }; -extern enum branch_track git_branch_track; extern enum rebase_setup_type autorebase; extern enum push_default_type push_default; @@ -972,7 +1023,17 @@ 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); + /* + * This is a temporary optimization hack. By asserting the size here, + * we let the compiler know that it's always going to be 20, which lets + * it turn this fixed-size memcmp into a few inline instructions. + * + * This will need to be extended or ripped out when we learn about + * hashes of different sizes. + */ + if (the_hash_algo->rawsz != 20) + BUG("hash size not yet supported by hashcmp"); + return memcmp(sha1, sha2, the_hash_algo->rawsz); } static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) @@ -992,7 +1053,7 @@ 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) @@ -1009,7 +1070,7 @@ 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) @@ -1362,18 +1423,20 @@ extern void *read_object_with_reference(const struct object_id *oid, extern struct object *peel_to_type(const char *name, int namelen, struct object *o, enum object_type); +enum date_mode_type { + DATE_NORMAL = 0, + DATE_RELATIVE, + DATE_SHORT, + DATE_ISO8601, + DATE_ISO8601_STRICT, + DATE_RFC2822, + DATE_STRFTIME, + DATE_RAW, + DATE_UNIX +}; + struct date_mode { - enum date_mode_type { - DATE_NORMAL = 0, - DATE_RELATIVE, - DATE_SHORT, - DATE_ISO8601, - DATE_ISO8601_STRICT, - DATE_RFC2822, - DATE_STRFTIME, - DATE_RAW, - DATE_UNIX - } type; + enum date_mode_type type; const char *strftime_fmt; int local; }; @@ -1514,62 +1577,6 @@ extern int odb_mkstemp(struct strbuf *temp_filename, const char *pattern); extern int odb_pack_keep(const char *name); /* - * Iterate over the files in the loose-object parts of the object - * directory "path", triggering the following callbacks: - * - * - loose_object is called for each loose object we find. - * - * - loose_cruft is called for any files that do not appear to be - * loose objects. Note that we only look in the loose object - * directories "objects/[0-9a-f]{2}/", so we will not report - * "objects/foobar" as cruft. - * - * - loose_subdir is called for each top-level hashed subdirectory - * of the object directory (e.g., "$OBJDIR/f0"). It is called - * after the objects in the directory are processed. - * - * Any callback that is NULL will be ignored. Callbacks returning non-zero - * will end the iteration. - * - * In the "buf" variant, "path" is a strbuf which will also be used as a - * scratch buffer, but restored to its original contents before - * the function returns. - */ -typedef int each_loose_object_fn(const struct object_id *oid, - const char *path, - void *data); -typedef int each_loose_cruft_fn(const char *basename, - const char *path, - void *data); -typedef int each_loose_subdir_fn(unsigned int nr, - const char *path, - void *data); -int for_each_file_in_obj_subdir(unsigned int subdir_nr, - struct strbuf *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); -int for_each_loose_file_in_objdir(const char *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); -int for_each_loose_file_in_objdir_buf(struct strbuf *path, - each_loose_object_fn obj_cb, - each_loose_cruft_fn cruft_cb, - each_loose_subdir_fn subdir_cb, - void *data); - -/* - * Iterate over loose objects in both the local - * repository and any alternates repositories (unless the - * LOCAL_ONLY flag is set). - */ -#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1 -extern int for_each_loose_object(each_loose_object_fn, void *, unsigned flags); - -/* * Set this to 0 to prevent sha1_object_info_extended() from fetching missing * blobs. This has a difference only if extensions.partialClone is set. * |