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91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsError_h__
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#define nsError_h__
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#ifndef __cplusplus
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# error nsError.h no longer supports C sources
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#endif
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#include "mozilla/Attributes.h"
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#include "mozilla/Likely.h"
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#include <stdint.h>
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#define NS_ERROR_SEVERITY_SUCCESS 0
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#define NS_ERROR_SEVERITY_ERROR 1
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#include "ErrorList.h" // IWYU pragma: export
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/**
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* @name Standard Error Handling Macros
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* @return 0 or 1 (false/true with bool type for C++)
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*/
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inline uint32_t NS_FAILED_impl(nsresult aErr) {
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return static_cast<uint32_t>(aErr) & 0x80000000;
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}
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#define NS_FAILED(_nsresult) ((bool)MOZ_UNLIKELY(NS_FAILED_impl(_nsresult)))
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#define NS_SUCCEEDED(_nsresult) ((bool)MOZ_LIKELY(!NS_FAILED_impl(_nsresult)))
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/* Check that our enum type is actually uint32_t as expected */
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static_assert(((nsresult)0) < ((nsresult)-1),
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"nsresult must be an unsigned type");
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static_assert(sizeof(nsresult) == sizeof(uint32_t), "nsresult must be 32 bits");
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#define MOZ_ALWAYS_SUCCEEDS(expr) MOZ_ALWAYS_TRUE(NS_SUCCEEDED(expr))
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/**
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* @name Standard Error Generating Macros
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*/
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#define NS_ERROR_GENERATE(sev, module, code) \
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(nsresult)(((uint32_t)(sev) << 31) | \
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((uint32_t)(module + NS_ERROR_MODULE_BASE_OFFSET) << 16) | \
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((uint32_t)(code)))
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#define NS_ERROR_GENERATE_SUCCESS(module, code) \
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NS_ERROR_GENERATE(NS_ERROR_SEVERITY_SUCCESS, module, code)
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#define NS_ERROR_GENERATE_FAILURE(module, code) \
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NS_ERROR_GENERATE(NS_ERROR_SEVERITY_ERROR, module, code)
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/*
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* This will return the nsresult corresponding to the most recent NSPR failure
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* returned by PR_GetError.
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*
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***********************************************************************
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* Do not depend on this function. It will be going away!
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***********************************************************************
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*/
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extern nsresult NS_ErrorAccordingToNSPR();
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/**
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* @name Standard Macros for retrieving error bits
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*/
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inline constexpr uint16_t NS_ERROR_GET_CODE(nsresult aErr) {
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return uint32_t(aErr) & 0xffff;
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}
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inline constexpr uint16_t NS_ERROR_GET_MODULE(nsresult aErr) {
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return ((uint32_t(aErr) >> 16) - NS_ERROR_MODULE_BASE_OFFSET) & 0x1fff;
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}
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inline bool NS_ERROR_GET_SEVERITY(nsresult aErr) {
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return uint32_t(aErr) >> 31;
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}
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#ifdef _MSC_VER
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# pragma warning(disable : 4251) /* 'nsCOMPtr<class nsIInputStream>' needs to \
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have dll-interface to be used by clients \
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of class 'nsInputStream' */
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# pragma warning( \
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disable : 4275) /* non dll-interface class 'nsISupports' used as base \
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for dll-interface class 'nsIRDFNode' */
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#endif
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#endif
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