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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /xpcom/base/nsError.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/base/nsError.h')
-rw-r--r-- | xpcom/base/nsError.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/xpcom/base/nsError.h b/xpcom/base/nsError.h new file mode 100644 index 0000000000..040cd4612c --- /dev/null +++ b/xpcom/base/nsError.h @@ -0,0 +1,90 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef nsError_h__ +#define nsError_h__ + +#ifndef __cplusplus +# error nsError.h no longer supports C sources +#endif + +#include "mozilla/Attributes.h" +#include "mozilla/Likely.h" + +#include <stdint.h> + +#define NS_ERROR_SEVERITY_SUCCESS 0 +#define NS_ERROR_SEVERITY_ERROR 1 + +#include "ErrorList.h" // IWYU pragma: export + +/** + * @name Standard Error Handling Macros + * @return 0 or 1 (false/true with bool type for C++) + */ + +inline uint32_t NS_FAILED_impl(nsresult aErr) { + return static_cast<uint32_t>(aErr) & 0x80000000; +} +#define NS_FAILED(_nsresult) ((bool)MOZ_UNLIKELY(NS_FAILED_impl(_nsresult))) +#define NS_SUCCEEDED(_nsresult) ((bool)MOZ_LIKELY(!NS_FAILED_impl(_nsresult))) + +/* Check that our enum type is actually uint32_t as expected */ +static_assert(((nsresult)0) < ((nsresult)-1), + "nsresult must be an unsigned type"); +static_assert(sizeof(nsresult) == sizeof(uint32_t), "nsresult must be 32 bits"); + +#define MOZ_ALWAYS_SUCCEEDS(expr) MOZ_ALWAYS_TRUE(NS_SUCCEEDED(expr)) + +/** + * @name Standard Error Generating Macros + */ + +#define NS_ERROR_GENERATE(sev, module, code) \ + (nsresult)(((uint32_t)(sev) << 31) | \ + ((uint32_t)(module + NS_ERROR_MODULE_BASE_OFFSET) << 16) | \ + ((uint32_t)(code))) + +#define NS_ERROR_GENERATE_SUCCESS(module, code) \ + NS_ERROR_GENERATE(NS_ERROR_SEVERITY_SUCCESS, module, code) + +#define NS_ERROR_GENERATE_FAILURE(module, code) \ + NS_ERROR_GENERATE(NS_ERROR_SEVERITY_ERROR, module, code) + +/* + * This will return the nsresult corresponding to the most recent NSPR failure + * returned by PR_GetError. + * + *********************************************************************** + * Do not depend on this function. It will be going away! + *********************************************************************** + */ +extern nsresult NS_ErrorAccordingToNSPR(); + +/** + * @name Standard Macros for retrieving error bits + */ + +inline constexpr uint16_t NS_ERROR_GET_CODE(nsresult aErr) { + return uint32_t(aErr) & 0xffff; +} +inline constexpr uint16_t NS_ERROR_GET_MODULE(nsresult aErr) { + return ((uint32_t(aErr) >> 16) - NS_ERROR_MODULE_BASE_OFFSET) & 0x1fff; +} +inline bool NS_ERROR_GET_SEVERITY(nsresult aErr) { + return uint32_t(aErr) >> 31; +} + +#ifdef _MSC_VER +# pragma warning(disable : 4251) /* 'nsCOMPtr<class nsIInputStream>' needs to \ + have dll-interface to be used by clients \ + of class 'nsInputStream' */ +# pragma warning( \ + disable : 4275) /* non dll-interface class 'nsISupports' used as base \ + for dll-interface class 'nsIRDFNode' */ +#endif + +#endif |