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Introduce xbps_array_foreach_cb() and use it in random code.

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This routine will spawn a thread per core to process N items stored
in the specified array, the last thread gets the remainder of items left.

Results have shown that xbps benefits if there is a considerable amount
of items and number of threads being spawned.

Use it in xbps_pkgdb_foreach_cb(), xbps-pkgdb(8), xbps-query(8)
and xbps-rindex(8).

On UP systems there's no overhead because pthread(3) is not used at all.

WIP! investigate if it can be used in libxbps (xbps_rpool_foreach()),
and finish conversion of xbps-rindex(8) -c.
This commit is contained in:
Juan RP
2013-07-27 09:47:16 +02:00
parent 432067de48
commit 0c7701f2bc
9 changed files with 255 additions and 295 deletions
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49
include/xbps.h.in
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@@ -46,7 +46,7 @@
*
* This header documents the full API for the XBPS Library.
*/
#define XBPS_API_VERSION "20130727"
#define XBPS_API_VERSION "20130727-1"
#ifndef XBPS_VERSION
#define XBPS_VERSION "UNSET"
@@ -709,7 +709,7 @@ xbps_array_t xbps_find_pkg_obsoletes(struct xbps_handle *xhp,
* the value returned by the function callback.
*/
int xbps_pkgdb_foreach_cb(struct xbps_handle *xhp,
int (*fn)(struct xbps_handle *, xbps_object_t, void *, bool *),
int (*fn)(struct xbps_handle *, xbps_object_t, const char *, void *, bool *),
void *arg);
/**
@@ -813,46 +813,11 @@ int xbps_pkg_exec_script(struct xbps_handle *xhp,
/** @addtogroup plist */
/*@{*/
/**
* Executes a function callback specified in \a fn with \a arg passed
* as its argument into they array \a array.
*
* @param[in] xhp The pointer to the xbps_handle struct.
* @param[in] array Proplib array to iterate.
* @param[in] fn Function callback to run on every object in the array.
* While running the function callback, the hird parameter (a pointer to
* a boolean) can be set to true to stop immediately the loop.
* @param[in] arg Argument to be passed to the function callback.
*
* @return 0 on success, otherwise the value returned by the function
* callback.
*/
int xbps_callback_array_iter(struct xbps_handle *xhp,
xbps_array_t array,
int (*fn)(struct xbps_handle *, xbps_object_t, void *, bool *),
void *arg);
/**
* Executes a function callback into the array associated with key \a key,
* contained in a proplib dictionary.
*
* @param[in] xhp The pointer to the xbps_handle struct.
* @param[in] dict Proplib dictionary where the array resides.
* @param[in] key Key associated with array.
* @param[in] fn Function callback to run on every
* object in the array. While running the function callback, the third
* parameter (a pointer to a boolean) can be set to true to stop
* immediately the loop.
* @param[in] arg Argument to be passed to the function callback.
*
* @return 0 on success (all objects were processed), otherwise
* the value returned by the function callback.
*/
int xbps_callback_array_iter_in_dict(struct xbps_handle *xhp,
xbps_dictionary_t dict,
const char *key,
int (*fn)(struct xbps_handle *, xbps_object_t, void *, bool *),
void *arg);
int xbps_array_foreach_cb(struct xbps_handle *xhp,
xbps_array_t array,
xbps_dictionary_t dict,
int (*fn)(struct xbps_handle *, xbps_object_t obj, const char *, void *arg, bool *done),
void *arg);
/**
* Match a virtual package name or pattern by looking at package's