mirror of
https://git.proxmox.com/git/libgit2
synced 2025-06-03 12:48:46 +00:00
8a2834d341
This makes the lock management on the index a little bit broader, having a number of routines hold the lock across looking up the item to be modified and actually making the modification. Still not true thread safety, but more pure index modifications are now safe which allows the simple cases (such as starting up a diff while index modifications are underway) safe enough to get the snapshot without hitting allocation problems. As part of this, I simplified the allocation of index entries to use a flex array and just put the path at the end of the index entry. This makes every entry self-contained and makes it a little easier to feel sure that pointers to strings aren't being accidentally copied and freed while other references are still being held.
177 lines
4.0 KiB
C
177 lines
4.0 KiB
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_common_h__
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#define INCLUDE_common_h__
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#include "git2/common.h"
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#include "cc-compat.h"
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/** Declare a function as always inlined. */
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#if defined(_MSC_VER)
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# define GIT_INLINE(type) static __inline type
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#else
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# define GIT_INLINE(type) static inline type
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#endif
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef GIT_WIN32
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# include <io.h>
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# include <direct.h>
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# include <winsock2.h>
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# include <windows.h>
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# include "win32/msvc-compat.h"
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# include "win32/mingw-compat.h"
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# include "win32/error.h"
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# include "win32/version.h"
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# ifdef GIT_THREADS
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# include "win32/pthread.h"
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# endif
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#else
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# include <unistd.h>
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# ifdef GIT_THREADS
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# include <pthread.h>
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# include <sched.h>
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# endif
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#define GIT_STDLIB_CALL
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# include <arpa/inet.h>
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#endif
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#include "git2/types.h"
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#include "git2/errors.h"
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#include "thread-utils.h"
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#include "bswap.h"
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#include <regex.h>
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/**
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* Check a pointer allocation result, returning -1 if it failed.
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*/
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#define GITERR_CHECK_ALLOC(ptr) if (ptr == NULL) { return -1; }
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/**
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* Check a return value and propogate result if non-zero.
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*/
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#define GITERR_CHECK_ERROR(code) \
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do { int _err = (code); if (_err) return _err; } while (0)
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/**
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* Set the error message for this thread, formatting as needed.
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*/
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void giterr_set(int error_class, const char *string, ...);
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/**
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* Set the error message for a regex failure, using the internal regex
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* error code lookup and return a libgit error code.
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*/
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int giterr_set_regex(const regex_t *regex, int error_code);
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/**
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* Set error message for user callback if needed.
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*
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* If the error code in non-zero and no error message is set, this
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* sets a generic error message.
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*
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* @return This always returns the `error_code` parameter.
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*/
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GIT_INLINE(int) giterr_set_after_callback_function(
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int error_code, const char *action)
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{
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if (error_code) {
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const git_error *e = giterr_last();
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if (!e || !e->message)
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giterr_set(e ? e->klass : GITERR_CALLBACK,
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"%s callback returned %d", action, error_code);
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}
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return error_code;
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}
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#ifdef GIT_WIN32
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#define giterr_set_after_callback(code) \
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giterr_set_after_callback_function((code), __FUNCTION__)
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#else
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#define giterr_set_after_callback(code) \
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giterr_set_after_callback_function((code), __func__)
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#endif
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/**
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* Gets the system error code for this thread.
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*/
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int giterr_system_last(void);
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/**
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* Sets the system error code for this thread.
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*/
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void giterr_system_set(int code);
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/**
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* Structure to preserve libgit2 error state
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*/
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typedef struct {
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int error_code;
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git_error error_msg;
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} git_error_state;
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/**
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* Capture current error state to restore later, returning error code.
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* If `error_code` is zero, this does nothing and returns zero.
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*/
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int giterr_capture(git_error_state *state, int error_code);
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/**
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* Restore error state to a previous value, returning saved error code.
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*/
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int giterr_restore(git_error_state *state);
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/**
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* Check a versioned structure for validity
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*/
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GIT_INLINE(int) giterr__check_version(const void *structure, unsigned int expected_max, const char *name)
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{
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unsigned int actual;
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if (!structure)
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return 0;
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actual = *(const unsigned int*)structure;
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if (actual > 0 && actual <= expected_max)
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return 0;
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giterr_set(GITERR_INVALID, "Invalid version %d on %s", actual, name);
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return -1;
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}
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#define GITERR_CHECK_VERSION(S,V,N) if (giterr__check_version(S,V,N) < 0) return -1
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/**
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* Initialize a structure with a version.
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*/
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GIT_INLINE(void) git__init_structure(void *structure, size_t len, unsigned int version)
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{
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memset(structure, 0, len);
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*((int*)structure) = version;
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}
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#define GIT_INIT_STRUCTURE(S,V) git__init_structure(S, sizeof(*S), V)
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/* NOTE: other giterr functions are in the public errors.h header file */
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#include "util.h"
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#endif /* INCLUDE_common_h__ */
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