@Added PHP API for Zend's ticks

Added PHP API for registering tick functions.  Ticks is a per-instruction
callback in Zend that allows us to implement cooperative multitasking
within PHP.  Example:

In extension code:

php_add_tick_function(my_tick_func);

void my_tick_func(int count) {
    php_printf("[tick %d]", count);
}

In PHP code:
<?php

declare(ticks = 1) {
    print "there should be two ticks here.\n";
}

?>

1 files changed, 2 insertions, 7 deletions

diff --git a/main/php_ticks.h b/main/php_ticks.h
index 078ca3aae2..1ca4617424 100644
--- a/main/php_ticks.h
+++ b/main/php_ticks.h
@@ -21,16 +21,11 @@
 #ifndef PHP_TICKS_H
 #define PHP_TICKS_H
 
-struct _php_tick_function_entry {
-	void (*func)(int count);
-	struct _php_tick_function_entry *next;
-};
-
 int php_startup_ticks(PLS_D);
 void php_shutdown_ticks(PLS_D);
 void php_run_ticks(int count);
-PHPAPI int php_add_tick_function(void (*func)(int count));
-PHPAPI int php_remove_tick_function(void (*func)(int count));
+PHPAPI void php_add_tick_function(void (*func)(int));
+PHPAPI void php_remove_tick_function(void (*func)(int));
 
 #endif