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Introduced append-only mode for systems with little available code space left, but which require basic FS support. Removes about 1.5kB ROM when the mode is enabled, i.e., COFFEE_CONF_APPEND_ONLY=1

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nvt-se 2010-04-12 13:20:55 +00:00
parent 8b6d34dbfc
commit f9ca4a546d
1 changed files with 15 additions and 0 deletions
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15
core/cfs/cfs-coffee.c
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@ -60,6 +60,16 @@
#define COFFEE_WATCHDOG_STOP()
#endif
#ifndef COFFEE_CONF_APPEND_ONLY
#define COFFEE_APPEND_ONLY 0
#else
#define COFFEE_APPEND_ONLY COFFEE_CONF_APPEND_ONLY
#if COFFEE_MICRO_LOGS
#error "Cannot have COFFEE_APPEND_ONLY when COFFEE_MICRO_LOGS is set."
#endif
#define COFFEE_MICRO_LOGS 0
#endif
#if COFFEE_START & (COFFEE_SECTOR_SIZE - 1)
#error COFFEE_START must point to the first byte in a sector.
#endif
@ -1177,6 +1187,11 @@ cfs_write(int fd, const void *buf, unsigned size)
}
} else {
#endif /* COFFEE_MICRO_LOGS */
#if COFFEE_APPEND_ONLY
if(fdp->offset < file->end) {
return -1;
}
#endif /* COFFEE_APPEND_ONLY */
COFFEE_WRITE(buf, size, absolute_offset(file->page, fdp->offset));
fdp->offset += size;
#if COFFEE_MICRO_LOGS