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sysapiloader: minor improvements of previous refactor 

Signed-off-by: Yuhang Zhao <2546789017@qq.com>
This commit is contained in:
Yuhang Zhao 2023-02-17 09:59:41 +08:00
parent fa8ca1ae2f
commit a375bc6748
2 changed files with 35 additions and 22 deletions
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1
include/FramelessHelper/Core/private/sysapiloader_p.h
View File

@ -40,6 +40,7 @@ public:
Q_NODISCARD static SysApiLoader *instance();
Q_NODISCARD static QString platformSharedLibrarySuffixName();
Q_NODISCARD static QString platformSystemLibraryDirectory();
Q_NODISCARD static QString generateUniqueKey(const QString &library, const QString &function);
Q_NODISCARD static QFunctionPointer resolve(const QString &library, const char *function);

56
src/core/sysapiloader.cpp
View File

@ -47,6 +47,8 @@
#include <QtCore/qhash.h>
#include <QtCore/qmutex.h>
#include <QtCore/qloggingcategory.h>
#include <QtCore/qdir.h>
#include <QtCore/qvarlengtharray.h>
#if SYSAPILOADER_QSYSTEMLIBRARY
# include <QtCore/private/qsystemlibrary_p.h>
#endif // SYSAPILOADER_QSYSTEMLIBRARY
@ -80,7 +82,7 @@ Q_GLOBAL_STATIC(SysApiLoaderData, g_loaderData)
Q_GLOBAL_STATIC(SysApiLoader, g_sysApiLoader)
static const bool LoaderDebug = qEnvironmentVariableIntValue("FRAMELESSHELPER_SYSAPILOADER_DEBUG");
static const bool LoaderDebugFlag = qEnvironmentVariableIntValue("FRAMELESSHELPER_SYSAPILOADER_DEBUG");
SysApiLoader::SysApiLoader(QObject *parent) : QObject(parent)
{
@ -103,7 +105,26 @@ QString SysApiLoader::platformSharedLibrarySuffixName()
#elif defined(Q_OS_MACOS)
return FRAMELESSHELPER_STRING_LITERAL(".dylib");
#else
#error Unsupported platform!
#error "Unsupported platform!"
#endif
}();
return result;
}
QString SysApiLoader::platformSystemLibraryDirectory()
{
static const auto result = []() -> QString {
#ifdef Q_OS_WINDOWS
QVarLengthArray<wchar_t, MAX_PATH> buf = {};
const UINT len = GetSystemDirectoryW(buf.data(), MAX_PATH);
if (len > MAX_PATH) {
// No need to +1 here, GetSystemDirectoryW() will always give us a null terminator.
buf.resize(len);
GetSystemDirectoryW(buf.data(), len);
}
return QString::fromWCharArray(buf.constData(), len);
#else
return FRAMELESSHELPER_STRING_LITERAL("/usr/lib");
#endif
}();
return result;
@ -116,18 +137,9 @@ QString SysApiLoader::generateUniqueKey(const QString &library, const QString &f
if (library.isEmpty() || function.isEmpty()) {
return {};
}
QString key = library;
QString key = QDir::toNativeSeparators(library);
// Remove path, only keep the file name.
const auto lastSeparatorPos = [&key]() -> qsizetype {
if (const qsizetype pos1 = key.lastIndexOf(u'/'); pos1 >= 0) {
return pos1;
} else if (const qsizetype pos2 = key.lastIndexOf(u'\\'); pos2 >= 0) {
return pos2;
} else {
return -1;
}
}();
if (lastSeparatorPos >= 0) {
if (const qsizetype lastSeparatorPos = key.lastIndexOf(QDir::separator()); lastSeparatorPos >= 0) {
key.remove(0, lastSeparatorPos);
}
#ifdef Q_OS_WINDOWS
@ -137,7 +149,7 @@ QString SysApiLoader::generateUniqueKey(const QString &library, const QString &f
if (!key.endsWith(suffix)) {
key.append(suffix);
}
key.append(u':');
key.append(u'@');
key.append(function);
return key;
}
@ -187,15 +199,15 @@ bool SysApiLoader::isAvailable(const QString &library, const QString &function)
const QString key = generateUniqueKey(library, function);
const QMutexLocker locker(&g_loaderData()->mutex);
if (g_loaderData()->functionCache.contains(key)) {
if (LoaderDebug) {
DEBUG << "Function cache found:" << key;
if (LoaderDebugFlag) {
DEBUG << Q_FUNC_INFO << "Function cache found:" << key;
}
return (g_loaderData()->functionCache.value(key) != nullptr);
} else {
const QFunctionPointer symbol = SysApiLoader::resolve(library, function);
g_loaderData()->functionCache.insert(key, symbol);
if (LoaderDebug) {
DEBUG << "New function cache:" << key << (symbol ? "[VALID]" : "[NULL]");
if (LoaderDebugFlag) {
DEBUG << Q_FUNC_INFO << "New function cache:" << key << (symbol ? "[VALID]" : "[NULL]");
}
if (symbol) {
DEBUG << "Successfully loaded" << function << "from" << library;
@ -217,13 +229,13 @@ QFunctionPointer SysApiLoader::get(const QString &library, const QString &functi
const QString key = generateUniqueKey(library, function);
const QMutexLocker locker(&g_loaderData()->mutex);
if (g_loaderData()->functionCache.contains(key)) {
if (LoaderDebug) {
DEBUG << "Function cache found:" << key;
if (LoaderDebugFlag) {
DEBUG << Q_FUNC_INFO << "Function cache found:" << key;
}
return g_loaderData()->functionCache.value(key);
} else {
if (LoaderDebug) {
DEBUG << "Function cache not found:" << key;
if (LoaderDebugFlag) {
DEBUG << Q_FUNC_INFO << "Function cache not found:" << key;
}
return nullptr;
}