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dqn: Add virtual memory funtions

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This commit is contained in:
doyle 2022-02-17 00:59:51 +11:00
parent dc6cdf37f7
commit 721c059c4e
1 changed files with 75 additions and 4 deletions
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75
dqn.h
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@ -798,6 +798,14 @@ DQN_API void Dqn_LogVDefault(Dqn_LogType type, void *user_data, char const *file
DQN_API void Dqn_LogV (Dqn_LogType type, void *user_data, char const *file, Dqn_uint file_len, char const *func, Dqn_uint func_len, Dqn_uint line, char const *fmt, va_list va);
DQN_API void Dqn_Log (Dqn_LogType type, void *user_data, char const *file, Dqn_uint file_len, char const *func, Dqn_uint func_len, Dqn_uint line, char const *fmt, ...);
// -------------------------------------------------------------------------------------------------
// NOTE: Dqn_Virtual
// -------------------------------------------------------------------------------------------------
DQN_API void *Dqn_VirtualReserve(Dqn_usize size, Dqn_b32 commit);
DQN_API Dqn_b32 Dqn_VirtualCommit(void *ptr, Dqn_usize size);
DQN_API void Dqn_VirtualDecommit(void *ptr, Dqn_usize size);
DQN_API void Dqn_VirtualRelease(void *ptr, Dqn_usize size);
// -------------------------------------------------------------------------------------------------
// NOTE: Dqn_AllocationTracer
// -------------------------------------------------------------------------------------------------
@ -3067,8 +3075,7 @@ DQN_API T *Dqn_ListAt(Dqn_List<T> *list, Dqn_isize index, Dqn_ListChunk<T> **at_
// NOTE: Allocation Type
#define MEM_RESERVE 0x00002000
#define MEM_COMMIT 0x00001000
// NOTE: Free Type
#define MEM_DECOMMIT 0x00004000
#define MEM_RELEASE 0x00008000
// NOTE: Protect
@ -3301,6 +3308,7 @@ DQN_API T *Dqn_ListAt(Dqn_List<T> *list, Dqn_isize index, Dqn_ListChunk<T> **at_
void __stdcall Sleep (unsigned long dwMilliseconds);
void * __stdcall VirtualAlloc (void *lpAddress, size_t dwSize, unsigned long flAllocationType, unsigned long flProtect);
/*BOOL*/ int __stdcall VirtualProtect (void *lpAddress, size_t dwSize, unsigned long flNewProtect, unsigned long *lpflOldProtect);
/*BOOL*/ int __stdcall VirtualFree (void *lpAddress, size_t dwSize, unsigned long dwFreeType);
void __stdcall GetSystemInfo (SYSTEM_INFO *system_info);
@ -3335,6 +3343,7 @@ DQN_API T *Dqn_ListAt(Dqn_List<T> *list, Dqn_isize index, Dqn_ListChunk<T> **at_
#include <sys/random.h> // getrandom
#include <sys/stat.h> // stat
#include <sys/sendfile.h> // sendfile
#include <sys/mman.h> // mmap
#include <time.h> // clock_gettime, nanosleep
#include <unistd.h> // access
#endif
@ -3555,6 +3564,68 @@ DQN_API void Dqn_Log(Dqn_LogType type, void *user_data, char const *file, Dqn_ui
va_end(va);
}
// -------------------------------------------------------------------------------------------------
// NOTE: Dqn_Virtual
// -------------------------------------------------------------------------------------------------
DQN_API void *Dqn_VirtualReserve(Dqn_usize size, Dqn_b32 commit)
{
#if defined(DQN_OS_WIN32)
unsigned long flags = MEM_RESERVE;
if (commit)
flags |= MEM_COMMIT;
void *result = VirtualAlloc(nullptr, size, MEM_RESERVE, PAGE_READWRITE);
#elif defined(DQN_OS_UNIX)
unsigned flags = PROT_NONE;
if (commit)
flags = PROT_READ | PROT_WRITE;
void *result = mmap(nullptr, size, flags, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (result == MAP_FAILED)
result = nullptr;
#else
#error "Missing implementation for Dqn_VirtualReserve"
#endif
return result;
}
DQN_API Dqn_b32 Dqn_VirtualCommit(void *ptr, Dqn_usize size)
{
#if defined(DQN_OS_WIN32)
Dqn_b32 result = VirtualAlloc(ptr, size, MEM_COMMIT, PAGE_READWRITE) != nullptr;
#elif defined(DQN_OS_UNIX)
Dqn_b32 result = mprotect(ptr, size, PROT_READ|PROT_WRITE) == 0;
#else
#error "Missing implementation for Dqn_VirtualCommit"
#endif
return result;
}
DQN_API void Dqn_VirtualDecommit(void *ptr, Dqn_usize size)
{
#if defined(DQN_OS_WIN32)
VirtualFree(ptr, size, MEM_DECOMMIT);
#elif defined(DQN_OS_UNIX)
mprotect(ptr, size, PROT_NONE)
madvise(ptr, size, MADV_FREE)
#else
#error "Missing implementation for Dqn_VirtualDecommit"
#endif
}
DQN_API void Dqn_VirtualRelease(void *ptr, Dqn_usize size)
{
#if defined(DQN_OS_WIN32)
VirtualFree(ptr, size, MEM_RELEASE);
#elif defined(DQN_OS_UNIX)
munmap(ptr, size);
#else
#error "Missing implementation for Dqn_VirtualRelease"
#endif
}
// -------------------------------------------------------------------------------------------------
// NOTE: Dqn_AllocationTracer
// -------------------------------------------------------------------------------------------------