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23 January 2022, 05:21:09 UTC
Revision 0ad8ff2cd185e84fd49dd961370411e379681f10 authored by Brandon Casey on 22 July 2009, 22:20:53 UTC, committed by Junio C Hamano on 23 July 2009, 04:57:41 UTC 
configure.ac: properly unset NEEDS_SSL_WITH_CRYPTO when sha1 func is missing
 
The empty assignment NEEDS_SSL_WITH_CRYPTO= was mistakenly paired with the
assignment NEEDS_SSL_WITH_CRYPTO=YesPlease in the "action-if-found"
parameter of the AC_CHECK_LIB macro.  The empty assignment was intended for
the "action-if-not-found" section, since in that case, the necessary sha1
hash function was not found and the internal sha1 implementation will be
used instead.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 24deea5
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Tip revision: 0ad8ff2cd185e84fd49dd961370411e379681f10 authored by Brandon Casey on 22 July 2009, 22:20:53 UTC
configure.ac: properly unset NEEDS_SSL_WITH_CRYPTO when sha1 func is missing
Tip revision: 0ad8ff2
preload-index.c 
/*
 * Copyright (C) 2008 Linus Torvalds
 */
#include "cache.h"

#ifdef NO_PTHREADS
static void preload_index(struct index_state *index, const char **pathspec)
{
	; /* nothing */
}
#else

#include <pthread.h>

/*
 * Mostly randomly chosen maximum thread counts: we
 * cap the parallelism to 20 threads, and we want
 * to have at least 500 lstat's per thread for it to
 * be worth starting a thread.
 */
#define MAX_PARALLEL (20)
#define THREAD_COST (500)

struct thread_data {
	pthread_t pthread;
	struct index_state *index;
	const char **pathspec;
	int offset, nr;
};

static void *preload_thread(void *_data)
{
	int nr;
	struct thread_data *p = _data;
	struct index_state *index = p->index;
	struct cache_entry **cep = index->cache + p->offset;
	struct cache_def cache;

	memset(&cache, 0, sizeof(cache));
	nr = p->nr;
	if (nr + p->offset > index->cache_nr)
		nr = index->cache_nr - p->offset;

	do {
		struct cache_entry *ce = *cep++;
		struct stat st;

		if (ce_stage(ce))
			continue;
		if (ce_uptodate(ce))
			continue;
		if (!ce_path_match(ce, p->pathspec))
			continue;
		if (threaded_has_symlink_leading_path(&cache, ce->name, ce_namelen(ce)))
			continue;
		if (lstat(ce->name, &st))
			continue;
		if (ie_match_stat(index, ce, &st, CE_MATCH_RACY_IS_DIRTY))
			continue;
		ce_mark_uptodate(ce);
	} while (--nr > 0);
	return NULL;
}

static void preload_index(struct index_state *index, const char **pathspec)
{
	int threads, i, work, offset;
	struct thread_data data[MAX_PARALLEL];

	if (!core_preload_index)
		return;

	threads = index->cache_nr / THREAD_COST;
	if (threads < 2)
		return;
	if (threads > MAX_PARALLEL)
		threads = MAX_PARALLEL;
	offset = 0;
	work = DIV_ROUND_UP(index->cache_nr, threads);
	for (i = 0; i < threads; i++) {
		struct thread_data *p = data+i;
		p->index = index;
		p->pathspec = pathspec;
		p->offset = offset;
		p->nr = work;
		offset += work;
		if (pthread_create(&p->pthread, NULL, preload_thread, p))
			die("unable to create threaded lstat");
	}
	for (i = 0; i < threads; i++) {
		struct thread_data *p = data+i;
		if (pthread_join(p->pthread, NULL))
			die("unable to join threaded lstat");
	}
}
#endif

int read_index_preload(struct index_state *index, const char **pathspec)
{
	int retval = read_index(index);

	preload_index(index, pathspec);
	return retval;
}
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