ccan/ccan/tal/stack/_info

#include "config.h"
#include <stdio.h>
#include <string.h>

/**
 * tal/stack - stack of tal contextes (inspired by talloc_stack)
 *
 * Implement a stack of tal contexts. A new (empty) context is pushed on top
 * of the stack using tal_newframe and it is popped/freed using tal_free().
 * tal_curframe() can be used to get the stack's top context.
 *
 * tal_stack can be used to implement per-function temporary allocation context
 * to help mitigating memory leaks, but unlike the plain tal approach it does not
 * require the caller to pass a destination context for returning allocated
 * values. Instead, allocated values are moved to the parent context using
 * tal_steal(tal_parent(tmp_ctx), ptr).
 *
 * Example:
 *	#include <assert.h>
 *	#include <ccan/tal/stack/stack.h>
 *
 *	static int *do_work(void)
 *	{
 *		int *retval = NULL;
 *		tal_t *tmp_ctx = tal_newframe();
 *
 *		int *val = talz(tmp_ctx, int);
 *		assert(val != NULL);
 *
 *		// ... do something with val ...
 *
 *		if (retval >= 0) {
 *			// steal to parent cxt so it survives tal_free()
 *			tal_steal(tal_parent(tmp_ctx), val);
 *			retval = val;
 *		}
 *		tal_free(tmp_ctx);
 *		return retval;
 *	}
 *
 *	int main(int argc, char *argv[])
 *	{
 *		tal_t *tmp_ctx = tal_newframe();
 *		int *val = do_work();
 *		if (val) {
 *			// ... do something with val ...
 *		}
 *		// val is eventually freed
 *		tal_free(tmp_ctx);
 *		return 0;
 *	}
 *
 * License: BSD-MIT
 * Author: Delio Brignoli <brignoli.delio@gmail.com>
 */
int main(int argc, char *argv[])
{
	/* Expect exactly one argument */
	if (argc != 2)
		return 1;

	if (strcmp(argv[1], "depends") == 0) {
		printf("ccan/tal\n");
		return 0;
	}

	return 1;
}