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database: pick old database file from any arch

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Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/425>
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Igor V. Kovalenko 2020-12-21 19:27:53 +03:00 • committed by Arun Raghavan
parent f8653fa5c1
commit c6b7837df3
5 changed files with 42 additions and 54 deletions
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21
src/pulsecore/database.h
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@ -38,14 +38,25 @@ typedef struct pa_datum {
void pa_datum_free(pa_datum *d);
/* Database implementation; returns non-empty system architecture name string if database file format depends on system architecture, or NULL otherwise. */
const char* pa_database_get_arch_suffix(void);
/* Database implementation; returns non-empty database filename extension string */
const char* pa_database_get_filename_suffix(void);
/* This will attempt opening database file matching compiled CANONICAL_HOST implementation architecture name prefix,
* or new database file will be created and opened with implementation architecture name suffix if required.
* If prependmid is true, file name is augmented with machine id prefix. */
/* Opens a database file. The file is loaded from the directory indicated by
* path. The file name is constructed by using fn as the base and then adding
* several parts:
* 1) If prependmid is true, the machine id is prepended to the file name.
* 2) The database implementation specific suffix is added.
* 3) Older versions of PulseAudio in some cases added the CPU architecture
* to the file name, which was later deemed unnecessary, but for
* compatibility reasons we still need to look for those files, so we scan
* the directory for files that match the prefix (possible machine id plus
* fn) and the suffix, and if any matches are found, we use the first one.
*
* When no existing file is found, we create a new file for the database
* (without the CPU architecture part in the name).
*
* For a read-only database, set for_write to false. */
pa_database* pa_database_open(const char *path, const char *fn, bool prependmid, bool for_write);
/* Database implementation; opens specified database file using provided path. */