mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager
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152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2013 Red Hat, Inc.
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*/
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/**
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* SECTION:nmt-utils
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* @short_description: Miscellaneous nmtui-specific utilities
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*/
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#include "nm-default.h"
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#include <string.h>
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#include "nmt-utils.h"
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/**
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* NmtSyncOp:
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*
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* A helper object used when synchronously waiting for an asynchronous
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* operation to complete.
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*
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* The caller first does:
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*
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* |[
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* NmtSyncOp op;
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*
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* nmt_sync_op_init (&op);
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* ]|
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*
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* It then passes the op as the user_data to the async operation's
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* callback function, and then calls nmt_sync_op_wait_boolean() or
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* nmt_sync_op_wait_pointer() to wait for the result.
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*
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* When the async callback is invoked, it should call
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* nmt_sync_op_complete_boolean() or nmt_sync_op_complete_pointer() to
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* return a result or an error to the caller.
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*
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* There is no free/clear function; any memory that needs to be freed
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* will have been returned to the caller from
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* nmt_sync_op_wait_boolean() or nmt_sync_op_wait_pointer(), so there
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* is nothing left that needs to be freed.
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*/
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typedef struct {
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gpointer result;
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GError *error;
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gpointer complete;
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} NmtSyncOpReal;
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/**
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* nmt_sync_op_init:
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* @op: pointer to a stack-allocated #NmtSyncOp
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*
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* Initializes @op before use.
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*/
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void
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nmt_sync_op_init (NmtSyncOp *op)
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{
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memset (op, 0, sizeof (*op));
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}
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/**
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* nmt_sync_op_wait_boolean:
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* @op: the #NmtSyncOp
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* @error: return location for a #GError
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*
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* This runs the main loop until @op's operation returns, and then
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* returns the result or error.
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*
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* Returns: the result of the operation.
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*/
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gboolean
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nmt_sync_op_wait_boolean (NmtSyncOp *op,
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GError **error)
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{
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return GPOINTER_TO_UINT (nmt_sync_op_wait_pointer (op, error));
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}
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/**
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* nmt_sync_op_complete_boolean:
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* @op: the #NmtSyncOp
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* @result: the result of the operation
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* @error: (allow-none): the error, or %NULL
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*
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* Completes @op and returns @result and/or @error to the caller.
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*/
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void
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nmt_sync_op_complete_boolean (NmtSyncOp *op,
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gboolean result,
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GError *error)
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{
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nmt_sync_op_complete_pointer (op, GUINT_TO_POINTER (result), error);
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}
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/**
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* nmt_sync_op_wait_pointer:
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* @op: the #NmtSyncOp
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* @error: return location for a #GError
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*
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* This runs the main loop until @op's operation returns, and then
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* returns the result or error.
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*
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* Returns: the result of the operation.
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*/
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gpointer
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nmt_sync_op_wait_pointer (NmtSyncOp *op,
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GError **error)
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{
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NmtSyncOpReal *real = (NmtSyncOpReal *)op;
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while (!real->complete)
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g_main_context_iteration (NULL, TRUE);
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if (real->error)
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g_propagate_error (error, real->error);
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return real->result;
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}
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/**
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* nmt_sync_op_complete_pointer:
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* @op: the #NmtSyncOp
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* @result: the result of the operation
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* @error: (allow-none): the error, or %NULL
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*
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* Completes @op and returns @result and/or @error to the caller.
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*/
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void
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nmt_sync_op_complete_pointer (NmtSyncOp *op,
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gpointer result,
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GError *error)
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{
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NmtSyncOpReal *real = (NmtSyncOpReal *)op;
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real->result = result;
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real->error = error ? g_error_copy (error) : NULL;
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real->complete = GUINT_TO_POINTER (TRUE);
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}
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