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f00c4ace1e
We'll soon be writing out an object map using the hashfile code. Add an fsync component to allow us to handle fsyncing it correctly. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
#ifndef WRITE_OR_DIE_H
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#define WRITE_OR_DIE_H
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void maybe_flush_or_die(FILE *, const char *);
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__attribute__((format (printf, 2, 3)))
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void fprintf_or_die(FILE *, const char *fmt, ...);
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void fwrite_or_die(FILE *f, const void *buf, size_t count);
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void fflush_or_die(FILE *f);
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void write_or_die(int fd, const void *buf, size_t count);
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/*
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* These values are used to help identify parts of a repository to fsync.
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* FSYNC_COMPONENT_NONE identifies data that will not be a persistent part of the
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* repository and so shouldn't be fsynced.
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*/
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enum fsync_component {
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FSYNC_COMPONENT_NONE,
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FSYNC_COMPONENT_LOOSE_OBJECT = 1 << 0,
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FSYNC_COMPONENT_PACK = 1 << 1,
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FSYNC_COMPONENT_PACK_METADATA = 1 << 2,
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FSYNC_COMPONENT_COMMIT_GRAPH = 1 << 3,
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FSYNC_COMPONENT_INDEX = 1 << 4,
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FSYNC_COMPONENT_REFERENCE = 1 << 5,
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FSYNC_COMPONENT_OBJECT_MAP = 1 << 6,
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};
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#define FSYNC_COMPONENTS_OBJECTS (FSYNC_COMPONENT_LOOSE_OBJECT | \
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FSYNC_COMPONENT_PACK)
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#define FSYNC_COMPONENTS_DERIVED_METADATA (FSYNC_COMPONENT_PACK_METADATA | \
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FSYNC_COMPONENT_COMMIT_GRAPH)
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#define FSYNC_COMPONENTS_DEFAULT ((FSYNC_COMPONENTS_OBJECTS | \
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FSYNC_COMPONENTS_DERIVED_METADATA) & \
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~FSYNC_COMPONENT_LOOSE_OBJECT)
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#define FSYNC_COMPONENTS_COMMITTED (FSYNC_COMPONENTS_OBJECTS | \
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FSYNC_COMPONENT_REFERENCE)
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#define FSYNC_COMPONENTS_ADDED (FSYNC_COMPONENTS_COMMITTED | \
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FSYNC_COMPONENT_INDEX)
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#define FSYNC_COMPONENTS_ALL (FSYNC_COMPONENT_LOOSE_OBJECT | \
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FSYNC_COMPONENT_PACK | \
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FSYNC_COMPONENT_PACK_METADATA | \
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FSYNC_COMPONENT_COMMIT_GRAPH | \
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FSYNC_COMPONENT_INDEX | \
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FSYNC_COMPONENT_REFERENCE | \
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FSYNC_COMPONENT_OBJECT_MAP)
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#ifndef FSYNC_COMPONENTS_PLATFORM_DEFAULT
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#define FSYNC_COMPONENTS_PLATFORM_DEFAULT FSYNC_COMPONENTS_DEFAULT
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#endif
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/* IO helper functions */
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void fsync_or_die(int fd, const char *);
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int fsync_component(enum fsync_component component, int fd);
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void fsync_component_or_die(enum fsync_component component, int fd, const char *msg);
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/*
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* A bitmask indicating which components of the repo should be fsynced.
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*/
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extern enum fsync_component fsync_components;
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extern int fsync_object_files;
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extern int use_fsync;
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enum fsync_method {
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FSYNC_METHOD_FSYNC,
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FSYNC_METHOD_WRITEOUT_ONLY,
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FSYNC_METHOD_BATCH,
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};
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extern enum fsync_method fsync_method;
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static inline int batch_fsync_enabled(enum fsync_component component)
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{
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return (fsync_components & component) && (fsync_method == FSYNC_METHOD_BATCH);
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}
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#endif /* WRITE_OR_DIE_H */
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