From ea631f6fb8dbffe3081ecf29eafa62ecd38ec64f Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Mon, 8 Nov 2010 02:51:18 +0000 Subject: [list] Add list_first_entry() There are several points in the iPXE codebase where list_for_each_entry() is (ab)used to extract only the first entry from a list. Add a macro list_first_entry() to make this code easier to read. Signed-off-by: Michael Brown --- src/core/process.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/core') diff --git a/src/core/process.c b/src/core/process.c index bc070e060..a32978564 100644 --- a/src/core/process.c +++ b/src/core/process.c @@ -83,7 +83,8 @@ void process_del ( struct process *process ) { void step ( void ) { struct process *process; - list_for_each_entry ( process, &run_queue, list ) { + if ( ( process = list_first_entry ( &run_queue, struct process, + list ) ) ) { list_del ( &process->list ); list_add_tail ( &process->list, &run_queue ); ref_get ( process->refcnt ); /* Inhibit destruction mid-step */ @@ -93,7 +94,6 @@ void step ( void ) { DBGC2 ( process, "PROCESS %p (%p) finished executing\n", process, process->step ); ref_put ( process->refcnt ); /* Allow destruction */ - break; } } -- cgit v1.2.3-55-g7522