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![Matheus Tavares](/assets/img/avatar_default.png)
git-grep uses 'grep_read_mutex' to protect its calls to object reading operations. But these have their own internal lock now, which ensures a better performance (allowing parallel access to more regions). So, let's remove the former and, instead, activate the latter with enable_obj_read_lock(). Sections that are currently protected by 'grep_read_mutex' but are not internally protected by the object reading lock should be surrounded by obj_read_lock() and obj_read_unlock(). These guarantee mutual exclusion with object reading operations, keeping the current behavior and avoiding race conditions. Namely, these places are: In grep.c: - fill_textconv() at fill_textconv_grep(). - userdiff_get_textconv() at grep_source_1(). In builtin/grep.c: - parse_object_or_die() and the submodule functions at grep_submodule(). - deref_tag() and gitmodules_config_oid() at grep_objects(). If these functions become thread-safe, in the future, we might remove the locking and probably get some speedup. Note that some of the submodule functions will already be thread-safe (or close to being thread-safe) with the internal object reading lock. However, as some of them will require additional modifications to be removed from the critical section, this will be done in its own patch. Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br> Signed-off-by: Junio C Hamano <gitster@pobox.com>
225 lines
4.9 KiB
C
225 lines
4.9 KiB
C
#ifndef GREP_H
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#define GREP_H
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#include "color.h"
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#ifdef USE_LIBPCRE1
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#include <pcre.h>
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#ifndef PCRE_NO_UTF8_CHECK
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#define PCRE_NO_UTF8_CHECK 0
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#endif
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#else
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typedef int pcre;
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typedef int pcre_extra;
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#endif
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#ifdef USE_LIBPCRE2
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#define PCRE2_CODE_UNIT_WIDTH 8
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#include <pcre2.h>
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#else
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typedef int pcre2_code;
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typedef int pcre2_match_data;
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typedef int pcre2_compile_context;
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#endif
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#include "thread-utils.h"
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#include "userdiff.h"
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struct repository;
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enum grep_pat_token {
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GREP_PATTERN,
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GREP_PATTERN_HEAD,
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GREP_PATTERN_BODY,
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GREP_AND,
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GREP_OPEN_PAREN,
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GREP_CLOSE_PAREN,
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GREP_NOT,
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GREP_OR
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};
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enum grep_context {
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GREP_CONTEXT_HEAD,
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GREP_CONTEXT_BODY
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};
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enum grep_header_field {
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GREP_HEADER_FIELD_MIN = 0,
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GREP_HEADER_AUTHOR = GREP_HEADER_FIELD_MIN,
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GREP_HEADER_COMMITTER,
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GREP_HEADER_REFLOG,
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/* Must be at the end of the enum */
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GREP_HEADER_FIELD_MAX
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};
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enum grep_color {
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GREP_COLOR_CONTEXT,
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GREP_COLOR_FILENAME,
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GREP_COLOR_FUNCTION,
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GREP_COLOR_LINENO,
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GREP_COLOR_COLUMNNO,
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GREP_COLOR_MATCH_CONTEXT,
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GREP_COLOR_MATCH_SELECTED,
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GREP_COLOR_SELECTED,
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GREP_COLOR_SEP,
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NR_GREP_COLORS
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};
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struct grep_pat {
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struct grep_pat *next;
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const char *origin;
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int no;
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enum grep_pat_token token;
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char *pattern;
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size_t patternlen;
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enum grep_header_field field;
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regex_t regexp;
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pcre *pcre1_regexp;
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pcre_extra *pcre1_extra_info;
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const unsigned char *pcre1_tables;
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int pcre1_jit_on;
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pcre2_code *pcre2_pattern;
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pcre2_match_data *pcre2_match_data;
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pcre2_compile_context *pcre2_compile_context;
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const uint8_t *pcre2_tables;
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uint32_t pcre2_jit_on;
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unsigned fixed:1;
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unsigned is_fixed:1;
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unsigned ignore_case:1;
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unsigned word_regexp:1;
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};
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enum grep_expr_node {
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GREP_NODE_ATOM,
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GREP_NODE_NOT,
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GREP_NODE_AND,
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GREP_NODE_TRUE,
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GREP_NODE_OR
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};
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enum grep_pattern_type {
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GREP_PATTERN_TYPE_UNSPECIFIED = 0,
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GREP_PATTERN_TYPE_BRE,
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GREP_PATTERN_TYPE_ERE,
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GREP_PATTERN_TYPE_FIXED,
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GREP_PATTERN_TYPE_PCRE
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};
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struct grep_expr {
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enum grep_expr_node node;
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unsigned hit;
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union {
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struct grep_pat *atom;
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struct grep_expr *unary;
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struct {
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struct grep_expr *left;
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struct grep_expr *right;
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} binary;
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} u;
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};
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struct grep_opt {
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struct grep_pat *pattern_list;
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struct grep_pat **pattern_tail;
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struct grep_pat *header_list;
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struct grep_pat **header_tail;
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struct grep_expr *pattern_expression;
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struct repository *repo;
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const char *prefix;
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int prefix_length;
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regex_t regexp;
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int linenum;
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int columnnum;
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int invert;
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int ignore_case;
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int status_only;
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int name_only;
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int unmatch_name_only;
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int count;
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int word_regexp;
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int fixed;
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int all_match;
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int debug;
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#define GREP_BINARY_DEFAULT 0
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#define GREP_BINARY_NOMATCH 1
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#define GREP_BINARY_TEXT 2
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int binary;
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int allow_textconv;
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int extended;
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int use_reflog_filter;
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int pcre1;
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int pcre2;
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int relative;
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int pathname;
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int null_following_name;
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int only_matching;
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int color;
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int max_depth;
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int funcname;
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int funcbody;
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int extended_regexp_option;
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int pattern_type_option;
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int ignore_locale;
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char colors[NR_GREP_COLORS][COLOR_MAXLEN];
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unsigned pre_context;
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unsigned post_context;
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unsigned last_shown;
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int show_hunk_mark;
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int file_break;
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int heading;
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void *priv;
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void (*output)(struct grep_opt *opt, const void *data, size_t size);
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void *output_priv;
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};
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void init_grep_defaults(struct repository *);
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int grep_config(const char *var, const char *value, void *);
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void grep_init(struct grep_opt *, struct repository *repo, const char *prefix);
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void grep_destroy(void);
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void grep_commit_pattern_type(enum grep_pattern_type, struct grep_opt *opt);
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void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, const char *origin, int no, enum grep_pat_token t);
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void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
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void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
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void compile_grep_patterns(struct grep_opt *opt);
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void free_grep_patterns(struct grep_opt *opt);
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int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size);
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struct grep_source {
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char *name;
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enum grep_source_type {
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GREP_SOURCE_OID,
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GREP_SOURCE_FILE,
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GREP_SOURCE_BUF,
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} type;
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void *identifier;
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char *buf;
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unsigned long size;
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char *path; /* for attribute lookups */
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struct userdiff_driver *driver;
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};
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void grep_source_init(struct grep_source *gs, enum grep_source_type type,
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const char *name, const char *path,
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const void *identifier);
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void grep_source_clear_data(struct grep_source *gs);
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void grep_source_clear(struct grep_source *gs);
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void grep_source_load_driver(struct grep_source *gs,
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struct index_state *istate);
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int grep_source(struct grep_opt *opt, struct grep_source *gs);
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struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
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int grep_threads_ok(const struct grep_opt *opt);
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/*
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* Mutex used around access to the attributes machinery if
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* opt->use_threads. Must be initialized/destroyed by callers!
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*/
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extern int grep_use_locks;
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extern pthread_mutex_t grep_attr_mutex;
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#endif
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