refs #5507 more mutex initializers

git-svn-id: file:///svn/toku/tokudb@48059 c7de825b-a66e-492c-adef-691d508d4ae1

ft/sub_block.cc

@@ -218,6 +218,7 @@ compress_all_sub_blocks(int n_sub_blocks, struct sub_block sub_block[], char *un
             T = T - 1;     // threads in addition to the running thread
 
         struct workset ws;
+        ZERO_STRUCT(ws);
         workset_init(&ws);
 
         struct compress_work work[n_sub_blocks];
@@ -317,6 +318,7 @@ decompress_all_sub_blocks(int n_sub_blocks, struct sub_block sub_block[], unsign
 
         // init the decompression work set
         struct workset ws;
+        ZERO_STRUCT(ws);
         workset_init(&ws);
 
         // initialize the decompression work and add to the work set

ft/tests/threadpool-test.cc

@@ -105,6 +105,7 @@ test_main (int argc, const char *argv[]) {
     struct my_threadpool my_threadpool;
     THREADPOOL threadpool;
 
+    ZERO_STRUCT(my_threadpool);
     my_threadpool_init(&my_threadpool, max_threads);
     threadpool = my_threadpool.threadpool;
     if (verbose) printf("test threadpool_set_busy\n");

ft/threadpool.cc

@@ -115,11 +115,10 @@ toku_thread_run_internal(void *arg) {
 int 
 toku_thread_pool_create(struct toku_thread_pool **pool_return, int max_threads) {
     int r;
-    struct toku_thread_pool *MALLOC(pool);
+    struct toku_thread_pool *CALLOC(pool);
     if (pool == NULL) {
         r = get_error_errno();
     } else {
-        memset(pool, 0, sizeof *pool);
         toku_mutex_init(&pool->lock, NULL);
         toku_list_init(&pool->free_threads);
         toku_list_init(&pool->all_threads);