thodg/libgit2/tests/threads/refdb.c

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• Hash : 7da4c429
  Author :
  Date : 2015-12-24T12:37:41
  

  refdb: adjust the threading tests to what we promise
  
  We say it's going to work if you use a different repository in each
  thread. Let's do precisely that in our code instead of hoping re-using
  the refdb is going to work.
  
  This test does fail currently, surfacing existing bugs.
  

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• tests/threads/refdb.c

• #include "clar_libgit2.h"
  #include "git2/refdb.h"
  #include "refdb.h"
  
  static git_repository *g_repo;
  static int g_expected = 0;
  
  void test_threads_refdb__initialize(void)
  {
  	g_repo = NULL;
  }
  
  void test_threads_refdb__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  	g_repo = NULL;
  }
  
  #define REPEAT 20
  #define THREADS 20
  
  struct th_data {
  	int id;
  	const char *path;
  };
  
  static void *iterate_refs(void *arg)
  {
  	struct th_data *data = (struct th_data *) arg;
  	git_reference_iterator *i;
  	git_reference *ref;
  	int count = 0;
  	git_repository *repo;
  
  	cl_git_pass(git_repository_open(&repo, data->path));
  	cl_git_pass(git_reference_iterator_new(&i, repo));
  
  	for (count = 0; !git_reference_next(&ref, i); ++count) {
  		cl_assert(ref != NULL);
  		git_reference_free(ref);
  	}
  
  	if (g_expected > 0)
  		cl_assert_equal_i(g_expected, count);
  
  	git_reference_iterator_free(i);
  
  	git_repository_free(repo);
  	giterr_clear();
  	return arg;
  }
  
  static void *create_refs(void *arg)
  {
  	int i;
  	struct th_data *data = (struct th_data *) arg;
  	git_oid head;
  	char name[128];
  	git_reference *ref[10];
  	git_repository *repo;
  
  	cl_git_pass(git_repository_open(&repo, data->path));
  
  	cl_git_pass(git_reference_name_to_id(&head, repo, "HEAD"));
  
  	for (i = 0; i < 10; ++i) {
  		p_snprintf(name, sizeof(name), "refs/heads/thread-%03d-%02d", data->id, i);
  		cl_git_pass(git_reference_create(&ref[i], repo, name, &head, 0, NULL));
  
  		if (i == 5) {
  			git_refdb *refdb;
  			cl_git_pass(git_repository_refdb(&refdb, repo));
  			cl_git_pass(git_refdb_compress(refdb));
  			git_refdb_free(refdb);
  		}
  	}
  
  	for (i = 0; i < 10; ++i)
  		git_reference_free(ref[i]);
  
  	git_repository_free(repo);
  
  	giterr_clear();
  	return arg;
  }
  
  static void *delete_refs(void *arg)
  {
  	int i;
  	struct th_data *data = (struct th_data *) arg;
  	git_reference *ref;
  	char name[128];
  	git_repository *repo;
  
  	cl_git_pass(git_repository_open(&repo, data->path));
  
  	for (i = 0; i < 10; ++i) {
  		p_snprintf(
  			name, sizeof(name), "refs/heads/thread-%03d-%02d", (data->id) & ~0x3, i);
  
  		if (!git_reference_lookup(&ref, repo, name)) {
  			cl_git_pass(git_reference_delete(ref));
  			git_reference_free(ref);
  		}
  
  		if (i == 5) {
  			git_refdb *refdb;
  			cl_git_pass(git_repository_refdb(&refdb, repo));
  			cl_git_pass(git_refdb_compress(refdb));
  			git_refdb_free(refdb);
  		}
  	}
  
  	git_repository_free(repo);
  	giterr_clear();
  	return arg;
  }
  
  void test_threads_refdb__edit_while_iterate(void)
  {
  	int r, t;
  	struct th_data th_data[THREADS];
  	git_oid head;
  	git_reference *ref;
  	char name[128];
  	git_refdb *refdb;
  
  #ifdef GIT_THREADS
  	git_thread th[THREADS];
  #endif
  
  	g_repo = cl_git_sandbox_init("testrepo2");
  
  	cl_git_pass(git_reference_name_to_id(&head, g_repo, "HEAD"));
  
  	/* make a bunch of references */
  
  	for (r = 0; r < 50; ++r) {
  		p_snprintf(name, sizeof(name), "refs/heads/starter-%03d", r);
  		cl_git_pass(git_reference_create(&ref, g_repo, name, &head, 0, NULL));
  		git_reference_free(ref);
  	}
  
  	cl_git_pass(git_repository_refdb(&refdb, g_repo));
  	cl_git_pass(git_refdb_compress(refdb));
  	git_refdb_free(refdb);
  
  	g_expected = -1;
  
  	g_repo = cl_git_sandbox_reopen(); /* reopen to flush caches */
  
  	for (t = 0; t < THREADS; ++t) {
  		void *(*fn)(void *arg);
  
  		switch (t & 0x3) {
  		case 0:  fn = create_refs;  break;
  		case 1:  fn = delete_refs;  break;
  		default: fn = iterate_refs; break;
  		}
  
  		th_data[t].id = t;
  		th_data[t].path = git_repository_path(g_repo);
  
  #ifdef GIT_THREADS
  		cl_git_pass(git_thread_create(&th[t], fn, &th_data[t]));
  #else
  		fn(&th_data[t]);
  #endif
  	}
  
  #ifdef GIT_THREADS
  	for (t = 0; t < THREADS; ++t) {
  		cl_git_pass(git_thread_join(&th[t], NULL));
  	}
  
  	memset(th, 0, sizeof(th));
  
  	for (t = 0; t < THREADS; ++t) {
  		th_data[t].id = t;
  		cl_git_pass(git_thread_create(&th[t], iterate_refs, &th_data[t]));
  	}
  
  	for (t = 0; t < THREADS; ++t) {
  		cl_git_pass(git_thread_join(&th[t], NULL));
  	}
  #endif
  }
  

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