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-rw-r--r--src/common/common_funcs.h6
-rw-r--r--src/common/fs/path_util.cpp38
-rw-r--r--src/common/fs/path_util.h6
-rw-r--r--src/common/host_memory.cpp38
-rw-r--r--src/common/host_memory.h2
5 files changed, 70 insertions, 20 deletions
diff --git a/src/common/common_funcs.h b/src/common/common_funcs.h
index 47d028d48..ba3081efb 100644
--- a/src/common/common_funcs.h
+++ b/src/common/common_funcs.h
@@ -123,6 +123,12 @@ namespace Common {
return u32(a) | u32(b) << 8 | u32(c) << 16 | u32(d) << 24;
}
+[[nodiscard]] constexpr u64 MakeMagic(char a, char b, char c, char d, char e, char f, char g,
+ char h) {
+ return u64(a) << 0 | u64(b) << 8 | u64(c) << 16 | u64(d) << 24 | u64(e) << 32 | u64(f) << 40 |
+ u64(g) << 48 | u64(h) << 56;
+}
+
// std::size() does not support zero-size C arrays. We're fixing that.
template <class C>
constexpr auto Size(const C& c) -> decltype(c.size()) {
diff --git a/src/common/fs/path_util.cpp b/src/common/fs/path_util.cpp
index c3a81f9a9..d2f50432a 100644
--- a/src/common/fs/path_util.cpp
+++ b/src/common/fs/path_util.cpp
@@ -354,18 +354,36 @@ std::string_view RemoveTrailingSlash(std::string_view path) {
return path;
}
-std::vector<std::string> SplitPathComponents(std::string_view filename) {
- std::string copy(filename);
- std::replace(copy.begin(), copy.end(), '\\', '/');
- std::vector<std::string> out;
-
- std::stringstream stream(copy);
- std::string item;
- while (std::getline(stream, item, '/')) {
- out.push_back(std::move(item));
+template <typename F>
+static void ForEachPathComponent(std::string_view filename, F&& cb) {
+ const char* component_begin = filename.data();
+ const char* const end = component_begin + filename.size();
+ for (const char* it = component_begin; it != end; ++it) {
+ const char c = *it;
+ if (c == '\\' || c == '/') {
+ if (component_begin != it) {
+ cb(std::string_view{component_begin, it});
+ }
+ component_begin = it + 1;
+ }
}
+ if (component_begin != end) {
+ cb(std::string_view{component_begin, end});
+ }
+}
+
+std::vector<std::string_view> SplitPathComponents(std::string_view filename) {
+ std::vector<std::string_view> components;
+ ForEachPathComponent(filename, [&](auto component) { components.emplace_back(component); });
+
+ return components;
+}
+
+std::vector<std::string> SplitPathComponentsCopy(std::string_view filename) {
+ std::vector<std::string> components;
+ ForEachPathComponent(filename, [&](auto component) { components.emplace_back(component); });
- return out;
+ return components;
}
std::string SanitizePath(std::string_view path_, DirectorySeparator directory_separator) {
diff --git a/src/common/fs/path_util.h b/src/common/fs/path_util.h
index 2874ea738..23c8b1359 100644
--- a/src/common/fs/path_util.h
+++ b/src/common/fs/path_util.h
@@ -289,7 +289,11 @@ enum class DirectorySeparator {
// Splits the path on '/' or '\' and put the components into a vector
// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" }
-[[nodiscard]] std::vector<std::string> SplitPathComponents(std::string_view filename);
+[[nodiscard]] std::vector<std::string_view> SplitPathComponents(std::string_view filename);
+
+// Splits the path on '/' or '\' and put the components into a vector
+// i.e. "C:\Users\Yuzu\Documents\save.bin" becomes {"C:", "Users", "Yuzu", "Documents", "save.bin" }
+[[nodiscard]] std::vector<std::string> SplitPathComponentsCopy(std::string_view filename);
// Removes trailing slash, makes all '\\' into '/', and removes duplicate '/'. Makes '/' into '\\'
// depending if directory_separator is BackwardSlash or PlatformDefault and running on windows
diff --git a/src/common/host_memory.cpp b/src/common/host_memory.cpp
index 4bfc64f2d..e540375b8 100644
--- a/src/common/host_memory.cpp
+++ b/src/common/host_memory.cpp
@@ -11,10 +11,6 @@
#elif defined(__linux__) || defined(__FreeBSD__) // ^^^ Windows ^^^ vvv Linux vvv
-#ifdef ANDROID
-#include <android/sharedmem.h>
-#endif
-
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
@@ -193,6 +189,11 @@ public:
}
}
+ bool ClearBackingRegion(size_t physical_offset, size_t length) {
+ // TODO: This does not seem to be possible on Windows.
+ return false;
+ }
+
void EnableDirectMappedAddress() {
// TODO
UNREACHABLE();
@@ -442,9 +443,7 @@ public:
}
// Backing memory initialization
-#ifdef ANDROID
- fd = ASharedMemory_create("HostMemory", backing_size);
-#elif defined(__FreeBSD__) && __FreeBSD__ < 13
+#if defined(__FreeBSD__) && __FreeBSD__ < 13
// XXX Drop after FreeBSD 12.* reaches EOL on 2024-06-30
fd = shm_open(SHM_ANON, O_RDWR, 0600);
#else
@@ -455,7 +454,6 @@ public:
throw std::bad_alloc{};
}
-#ifndef ANDROID
// Defined to extend the file with zeros
int ret = ftruncate(fd, backing_size);
if (ret != 0) {
@@ -463,7 +461,6 @@ public:
strerror(errno));
throw std::bad_alloc{};
}
-#endif
backing_base = static_cast<u8*>(
mmap(nullptr, backing_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
@@ -552,6 +549,19 @@ public:
ASSERT_MSG(ret == 0, "mprotect failed: {}", strerror(errno));
}
+ bool ClearBackingRegion(size_t physical_offset, size_t length) {
+#ifdef __linux__
+ // Set MADV_REMOVE on backing map to destroy it instantly.
+ // This also deletes the area from the backing file.
+ int ret = madvise(backing_base + physical_offset, length, MADV_REMOVE);
+ ASSERT_MSG(ret == 0, "madvise failed: {}", strerror(errno));
+
+ return true;
+#else
+ return false;
+#endif
+ }
+
void EnableDirectMappedAddress() {
virtual_base = nullptr;
}
@@ -623,6 +633,10 @@ public:
void Protect(size_t virtual_offset, size_t length, bool read, bool write, bool execute) {}
+ bool ClearBackingRegion(size_t physical_offset, size_t length) {
+ return false;
+ }
+
void EnableDirectMappedAddress() {}
u8* backing_base{nullptr};
@@ -698,6 +712,12 @@ void HostMemory::Protect(size_t virtual_offset, size_t length, bool read, bool w
impl->Protect(virtual_offset + virtual_base_offset, length, read, write, execute);
}
+void HostMemory::ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value) {
+ if (!impl || fill_value != 0 || !impl->ClearBackingRegion(physical_offset, length)) {
+ std::memset(backing_base + physical_offset, fill_value, length);
+ }
+}
+
void HostMemory::EnableDirectMappedAddress() {
if (impl) {
impl->EnableDirectMappedAddress();
diff --git a/src/common/host_memory.h b/src/common/host_memory.h
index cebfacab2..747c5850c 100644
--- a/src/common/host_memory.h
+++ b/src/common/host_memory.h
@@ -48,6 +48,8 @@ public:
void EnableDirectMappedAddress();
+ void ClearBackingRegion(size_t physical_offset, size_t length, u32 fill_value);
+
[[nodiscard]] u8* BackingBasePointer() noexcept {
return backing_base;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-28 15:51:03 +0200