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88071abb43
Our coding style recommends C style comments (/* */) instead of C++ (//). Also, systemd (which we partly fork) uses C style comments for the SPDX-License-Identifier. Unify the style. $ sed -i '1 s#// SPDX-License-Identifier: \([^ ]\+\)$#/* SPDX-License-Identifier: \1 */#' -- $(git ls-files -- '*.[hc]' '*.[hc]pp')
130 lines
3 KiB
C
130 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 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 "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, 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, gboolean result, 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, 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, gpointer result, 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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