code: libextents

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cosmetic changes

--- a/extents.h

+++ b/extents.h

@@ -4,7 +4,7 @@

 	This is similar in functionality to pool(2).

  Extents are used to manage contiguous space (such as memory space and disk space).

- 	The space is is split into units of the same size (quantum).

+	The space is is split into units of the same size (quantum).

  All space is split into a sequence of units. Each such sequence of units

 	is called an Extent. The data structure Extents is used to contain this

@@ -47,16 +47,6 @@

 When freeing blocks, it tries to merge with the neighbours to become bigger extents.

 */

-struct Extent {

-	struct Extent *low, *high;	/* sorted by start */

-	struct Extent *small, *big;	/* sorted by the number of blocks in this extent */

-	u64 start;					/* where this extent starts from */

-	u64 len; 					/* how many units in this extent */

-

-	/* circular least recently used linked list limited to Nlru items */

-	struct Extent *prev, *next;

-};

-

 struct Extents {

 	char name[32];

 	u64 quantum;	/* allocations are a multiple of quantum */

@@ -69,7 +59,7 @@

 	void (*panic)(char *fmt, ...);

 	void *(*malloc)(u32 sz);

-	/* private stuff */

+	/* private */

 	Extent *lowest;	/* find the first block number in a jiffy */

 	QLock lck;

 	u64 n;			/* number of extents */

@@ -79,6 +69,22 @@

 	Extent *lru;	/* least recently used extent in the circular lru linked list */

 };

+struct Extent {

+	struct Extent *low, *high;	/* sorted by start */

+	struct Extent *small, *big;	/* sorted by the number of blocks in this extent */

+	u64 start;					/* where this extent starts from */

+	u64 len; 					/* how many units in this extent */

+

+	/* circular least recently used linked list limited to Nlru items */

+	struct Extent *prev, *next;

+};

+

+void	initextents(Extents *es, char *name, u64 quantum, u8 loglevel, u32 logfd, void (*flush)(void), void (*log)(int fd, char *fmt, ...), void (*panic)(char *fmt, ...), void *(*malloc)(u32 sz));

+u64	 qalloc(Extents *es, u64 len);			/* allocate len*quantum */

+void qfree(Extents *es, u64 start, u64 len);/* free len*quantum starting from start */

+u64	 nfrees(Extents *es);

+Extents *holes(Extents *es, Extents *inv);

+

 void	showblocknos(int fd, Extents *es);

 void	showextents(int fd, char *msg, Extents *es);

 void	showextentslists(int fd, char *msg, Extents *es);

@@ -86,10 +92,3 @@

 s32	sizeofextents(Extents *es);

 s32	saveextents(Extents *es, s8 *buf, u32 nbuf);

 s32	loadextents(Extents *es, s8 *buf, u32 nbuf);

-

-u64	 qalloc(Extents *es, u64 len);			/* allocate len*quantum */

-void qfree(Extents *es, u64 start, u64 len);/* free len*quantum starting from start */

-u64	 nfrees(Extents *es);

-Extents *holes(Extents *es, Extents *inv);

-

-void	initextents(Extents *es, char *name, u64 quantum, u8 loglevel, u32 logfd, void (*flush)(void), void (*log)(int fd, char *fmt, ...), void (*panic)(char *fmt, ...), void *(*malloc)(u32 sz));