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Update osdlib.h #19

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165 changes: 75 additions & 90 deletions src/osd/modules/lib/osdlib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
#include <type_traits>
#include <vector>
#include <memory>
#include <cstdint> // For std::uint8_t

/*-----------------------------------------------------------------------------
osd_process_kill: kill the current process
Expand All @@ -36,7 +37,6 @@

void osd_process_kill();


/*-----------------------------------------------------------------------------
osd_setenv: set environment variable

Expand All @@ -53,98 +53,85 @@ void osd_process_kill();

int osd_setenv(const char *name, const char *value, int overwrite);


/*-----------------------------------------------------------------------------
osd_get_clipboard_text: retrieves text from the clipboard
-----------------------------------------------------------------------------*/
std::string osd_get_clipboard_text();


namespace osd {

bool invalidate_instruction_cache(void const *start, std::size_t size);


class virtual_memory_allocation
{
class virtual_memory_allocation {
public:
enum : unsigned
{
NONE = 0x00,
READ = 0x01,
WRITE = 0x02,
EXECUTE = 0x04,
READ_WRITE = READ | WRITE,
READ_EXECUTE = READ | EXECUTE,
READ_WRITE_EXECUTE = READ | WRITE | EXECUTE
};

virtual_memory_allocation(virtual_memory_allocation const &) = delete;
virtual_memory_allocation &operator=(virtual_memory_allocation const &) = delete;

virtual_memory_allocation() { }
virtual_memory_allocation(std::initializer_list<std::size_t> blocks, unsigned intent)
{
m_memory = do_alloc(blocks, intent, m_size, m_page_size);
}
virtual_memory_allocation(virtual_memory_allocation &&that) : m_memory(that.m_memory), m_size(that.m_size), m_page_size(that.m_page_size)
{
that.m_memory = nullptr;
that.m_size = that.m_page_size = 0U;
}
~virtual_memory_allocation()
{
if (m_memory)
do_free(m_memory, m_size);
}

explicit operator bool() const { return bool(m_memory); }
void *get() { return m_memory; }
std::size_t size() const { return m_size; }
std::size_t page_size() const { return m_page_size; }

bool set_access(std::size_t start, std::size_t size, unsigned access)
{
if ((start % m_page_size) || (size % m_page_size) || (start > m_size) || ((m_size - start) < size))
return false;
else
return do_set_access(reinterpret_cast<std::uint8_t *>(m_memory) + start, size, access);
}

virtual_memory_allocation &operator=(std::nullptr_t)
{
if (m_memory)
do_free(m_memory, m_size);
m_memory = nullptr;
m_size = m_page_size = 0U;
return *this;
}

virtual_memory_allocation &operator=(virtual_memory_allocation &&that)
{
if (&that != this)
{
if (m_memory)
do_free(m_memory, m_size);
m_memory = that.m_memory;
m_size = that.m_size;
m_page_size = that.m_page_size;
that.m_memory = nullptr;
that.m_size = that.m_page_size = 0U;
}
return *this;
}
enum : unsigned {
NONE = 0x00,
READ = 0x01,
WRITE = 0x02,
EXECUTE = 0x04,
READ_WRITE = READ | WRITE,
READ_EXECUTE = READ | EXECUTE,
READ_WRITE_EXECUTE = READ | WRITE | EXECUTE
};

virtual_memory_allocation(virtual_memory_allocation const &) = delete;
virtual_memory_allocation &operator=(virtual_memory_allocation const &) = delete;

virtual_memory_allocation() { }
virtual_memory_allocation(std::initializer_list<std::size_t> blocks, unsigned intent) {
m_memory = do_alloc(blocks, intent, m_size, m_page_size);
}
virtual_memory_allocation(virtual_memory_allocation &&that) : m_memory(that.m_memory), m_size(that.m_size), m_page_size(that.m_page_size) {
that.m_memory = nullptr;
that.m_size = that.m_page_size = 0U;
}
~virtual_memory_allocation() {
if (m_memory)
do_free(m_memory, m_size);
}

explicit operator bool() const { return bool(m_memory); }
void *get() { return m_memory; }
std::size_t size() const { return m_size; }
std::size_t page_size() const { return m_page_size; }

bool set_access(std::size_t start, std::size_t size, unsigned access) {
if ((start % m_page_size) || (size % m_page_size) || (start > m_size) || ((m_size - start) < size))
return false;
else
return do_set_access(reinterpret_cast<std::uint8_t *>(m_memory) + start, size, access);
}

virtual_memory_allocation &operator=(std::nullptr_t) {
if (m_memory)
do_free(m_memory, m_size);
m_memory = nullptr;
m_size = m_page_size = 0U;
return *this;
}

virtual_memory_allocation &operator=(virtual_memory_allocation &&that) {
if (&that != this) {
if (m_memory)
do_free(m_memory, m_size);
m_memory = that.m_memory;
m_size = that.m_size;
m_page_size = that.m_page_size;
that.m_memory = nullptr;
that.m_size = that.m_page_size = 0U;
}
return *this;
}

private:
static void *do_alloc(std::initializer_list<std::size_t> blocks, unsigned intent, std::size_t &size, std::size_t &page_size);
static void do_free(void *start, std::size_t size);
static bool do_set_access(void *start, std::size_t size, unsigned access);
static void *do_alloc(std::initializer_list<std::size_t> blocks, unsigned intent, std::size_t &size, std::size_t &page_size);
static void do_free(void *start, std::size_t size);
static bool do_set_access(void *start, std::size_t size, unsigned access);

void *m_memory = nullptr;
std::size_t m_size = 0U, m_page_size = 0U;
void *m_memory = nullptr;
std::size_t m_size = 0U, m_page_size = 0U;
};


/*-----------------------------------------------------------------------------
dynamic_module: load functions from optional shared libraries

Expand All @@ -156,25 +143,23 @@ class virtual_memory_allocation
revisions of a same library)
-----------------------------------------------------------------------------*/

class dynamic_module
{
class dynamic_module {
public:
typedef std::unique_ptr<dynamic_module> ptr;
typedef std::unique_ptr<dynamic_module> ptr;

static ptr open(std::vector<std::string> &&libraries);
static ptr open(std::vector<std::string> &&libraries);

virtual ~dynamic_module() { };
virtual ~dynamic_module() { };

template <typename T>
typename std::enable_if_t<std::is_pointer_v<T>, T> bind(char const *symbol)
{
return reinterpret_cast<T>(get_symbol_address(symbol));
}
template <typename T>
typename std::enable_if_t<std::is_pointer_v<T>, T> bind(char const *symbol) {
return reinterpret_cast<T>(get_symbol_address(symbol));
}

protected:
typedef void (*generic_fptr_t)();
typedef void (*generic_fptr_t)();

virtual generic_fptr_t get_symbol_address(char const *symbol) = 0;
virtual generic_fptr_t get_symbol_address(char const *symbol) = 0;
};

} // namespace osd
Expand Down