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base: abdelrahman:9807334ac915442c266526122615dfab8973dbcd
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abdelrahman:main
abdelrahman:generic
abdelrahman:growing_arena
abdelrahman:mem_context_and_allocator
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compare: abdelrahman:61c29ee56430fb5d5d137e785c0aad396e829555
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abdelrahman:main
abdelrahman:generic
abdelrahman:growing_arena
abdelrahman:mem_context_and_allocator

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80
src/mem/util/mem_utils.c
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@ -1,43 +1,8 @@
#include "mem_utils.h"
#include "aliases.h"
#include "platform.h"
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#if defined(WAPP_PLATFORM_WINDOWS)
#include <Windows.h>
#include <memoryapi.h>
internal const i32 access_types[] = {
[WAPP_MEM_ACCESS_NONE] = PAGE_NOACCESS,
[WAPP_MEM_ACCESS_READ_ONLY] = PAGE_READONLY,
[WAPP_MEM_ACCESS_EXEC_ONLY] = PAGE_EXECUTE,
[WAPP_MEM_ACCESS_READ_WRITE] = PAGE_READWRITE,
[WAPP_MEM_ACCESS_READ_EXEC] = PAGE_EXECUTE_READ,
[WAPP_MEM_ACCESS_READ_WRITE_EXEC] = PAGE_EXECUTE_READWRITE,
};
internal inline void *alloc_windows(u64 size, MemAccess access,
MemAllocFlags flags);
#elif defined(WAPP_PLATFORM_POSIX)
#include <sys/mman.h>
internal const i32 access_types[] = {
[WAPP_MEM_ACCESS_NONE] = PROT_NONE,
[WAPP_MEM_ACCESS_READ_ONLY] = PROT_READ,
[WAPP_MEM_ACCESS_EXEC_ONLY] = PROT_EXEC,
[WAPP_MEM_ACCESS_READ_WRITE] = PROT_READ | PROT_WRITE,
[WAPP_MEM_ACCESS_READ_EXEC] = PROT_READ | PROT_EXEC,
[WAPP_MEM_ACCESS_READ_WRITE_EXEC] = PROT_READ | PROT_WRITE | PROT_EXEC,
};
internal inline void *alloc_posix(u64 size, MemAccess access,
MemAllocFlags flags);
#else
#error "Unrecognised platform"
#endif
internal bool is_power_of_two(u64 num) { return (num & (num - 1)) == 0; }
@ -61,48 +26,3 @@ void *wapp_mem_util_align_forward(void *ptr, u64 alignment) {
return (void *)p;
}
void *wapp_mem_util_alloc(u64 size, MemAccess access, MemAllocFlags flags,
MemInitType type) {
#if defined(WAPP_PLATFORM_WINDOWS)
void *output = alloc_windows(size, access, flags);
#elif defined(WAPP_PLATFORM_POSIX)
void *output = alloc_posix(size, access, flags);
#else
return NULL;
#endif
if (type == WAPP_MEM_INIT_INITIALISED) {
memset(output, 0, size);
}
return output;
}
void wapp_mem_util_free(void *ptr, u64 size) {
#if defined(WAPP_PLATFORM_WINDOWS)
VirtualFree(ptr, size, MEM_RELEASE);
#elif defined(WAPP_PLATFORM_POSIX)
munmap(ptr, size);
#endif
}
#ifdef WAPP_PLATFORM_WINDOWS
internal inline void *alloc_windows(u64 size, MemAccess access,
MemAllocFlags flags) {
return VirtualAlloc2(NULL, NULL, (SIZE_T)size, flags, access_types[access]);
}
#endif
#if defined(WAPP_PLATFORM_POSIX)
internal inline void *alloc_posix(u64 size, MemAccess access,
MemAllocFlags flags) {
i32 alloc_flags = flags | MAP_ANON | MAP_PRIVATE;
#ifdef WAPP_PLATFORM_LINUX
alloc_flags |= MAP_NORESERVE;
#endif
return mmap(NULL, size, access_types[access], alloc_flags, -1, 0);
}
#endif

37
src/mem/util/mem_utils.h
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@ -2,49 +2,12 @@
#define MEM_UTILS_H
#include "aliases.h"
#include "platform.h"
#if defined(WAPP_PLATFORM_WINDOWS)
#include <Windows.h>
#include <memoryapi.h>
#elif defined(WAPP_PLATFORM_POSIX)
#include <sys/mman.h>
#else
#error "Unrecognised platform"
#endif
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
typedef enum mem_access {
WAPP_MEM_ACCESS_NONE,
WAPP_MEM_ACCESS_READ_ONLY,
WAPP_MEM_ACCESS_EXEC_ONLY,
WAPP_MEM_ACCESS_READ_WRITE,
WAPP_MEM_ACCESS_READ_EXEC,
WAPP_MEM_ACCESS_READ_WRITE_EXEC,
} MemAccess;
typedef enum mem_alloc_flags {
#if defined(WAPP_PLATFORM_WINDOWS)
WAPP_MEM_ALLOC_RESERVE = MEM_RESERVE,
WAPP_MEM_ALLOC_COMMIT = MEM_COMMIT,
#elif defined(WAPP_PLATFORM_POSIX)
WAPP_MEM_ALLOC_RESERVE = 0,
WAPP_MEM_ALLOC_COMMIT = MAP_POPULATE,
#endif
} MemAllocFlags;
typedef enum mem_init_type {
WAPP_MEM_INIT_UNINITIALISED,
WAPP_MEM_INIT_INITIALISED,
} MemInitType;
void *wapp_mem_util_align_forward(void *ptr, u64 alignment);
void *wapp_mem_util_alloc(u64 size, MemAccess access, MemAllocFlags flags,
MemInitType type);
void wapp_mem_util_free(void *ptr, u64 size);
#ifdef __cplusplus
}

61
src/platform/platform.h
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@ -1,61 +0,0 @@
#ifndef PLATFORM_H
#define PLATFORM_H
#if defined(__ANDROID__)
#define WAPP_PLATFORM_ANDROID
#define WAPP_PLATFORM_POSIX
#elif defined(__FreeBSD__)
#define WAPP_PLATFORM_FREE_BSD
#define WAPP_PLATFORM_BSD
#define WAPP_PLATFORM_POSIX
#elif defined(__NetBSD__)
#define WAPP_PLATFORM_NET_BSD
#define WAPP_PLATFORM_BSD
#define WAPP_PLATFORM_POSIX
#elif defined(__OpenBSD__)
#define WAPP_PLATFORM_OPEN_BSD
#define WAPP_PLATFORM_BSD
#define WAPP_PLATFORM_POSIX
#elif defined(__DragonFly__)
#define WAPP_PLATFORM_DRAGON_FLY
#define WAPP_PLATFORM_BSD
#define WAPP_PLATFORM_POSIX
#elif defined(__bsdi__)
#define WAPP_PLATFORM_BSD
#define WAPP_PLATFORM_POSIX
#elif defined(__linux__) || defined(linux) || defined(__linux) || \
defined(__gnu_linux__)
#define WAPP_PLATFORM_LINUX
#define WAPP_PLATFORM_POSIX
#elif defined(__GNU__) || defined(__gnu_hurd__)
#define WAPP_PLATFORM_GNU
#define WAPP_PLATFORM_POSIX
#elif defined(__APPLE__) || defined(__MACH__)
#if TARGET_OS_IPHONE
#define WAPP_PLATFORM_IOS
#define WAPP_PLATFORM_APPLE
#define WAPP_PLATFORM_POSIX
#elif TARGET_OS_MAC
#define WAPP_PLATFORM_MACOS
#define WAPP_PLATFORM_APPLE
#define WAPP_PLATFORM_POSIX
#else
#error "Unrecognised Apple platform"
#endif
#elif defined(_WIN64)
#define WAPP_PLATFORM_WINDOWS64
#define WAPP_PLATFORM_WINDOWS
#elif defined(_WIN32)
#define WAPP_PLATFORM_WINDOWS32
#define WAPP_PLATFORM_WINDOWS
#elif defined(__CYGWIN__)
#define WAPP_PLATFORM_CYGWIN
#define WAPP_PLATFORM_WINDOWS
#elif defined(__unix__) || defined(__unix)
#define WAPP_PLATFORM_UNIX
#define WAPP_PLATFORM_POSIX
#else
#error "Unrecognised platform"
#endif
#endif // !PLATFORM_H