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#include "shared_memory.h"
#if defined(_WIN32) && !defined(__CYGWIN__)
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# endif
# ifndef NOMINMAX
# define NOMINMAX
# endif
# include <windows.h>
kit_shared_memory_t kit_shared_memory_open(kit_str_t name, i64 size,
i32 mode) {
kit_shared_memory_t mem;
memset(&mem, 0, sizeof mem);
char buf[264] = "Global\\";
assert(size > 0);
assert(name.size > 0);
assert(name.size + 8 < (i64) sizeof buf);
assert(name.values != NULL);
if (name.size <= 0) {
mem.status = KIT_ERROR_INVALID_NAME;
return mem;
}
if (name.size + 8 >= (i64) sizeof buf) {
mem.status = KIT_ERROR_NAME_TOO_LONG;
return mem;
}
for (i64 i = 0; i < name.size; i++)
if (name.values[i] == '/' || name.values[i] == '\\') {
mem.status = KIT_ERROR_INVALID_NAME;
return mem;
}
memcpy(buf + 7, name.values, name.size);
buf[7 + name.size] = '\0';
HANDLE h = mode == KIT_SHARED_MEMORY_CREATE
? CreateFileMappingA(
INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
(DWORD) (size >> 32), (DWORD) size, buf)
: OpenFileMappingA(FILE_MAP_ALL_ACCESS, 0, buf);
if (h == INVALID_HANDLE_VALUE) {
mem.status = KIT_ERROR_OPEN_FAILED;
return mem;
}
void *p = MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0,
(SIZE_T) size);
if (p == NULL) {
CloseHandle(h);
mem.status = KIT_ERROR_MAP_FAILED;
return mem;
}
mem.status = KIT_OK;
mem.size = size;
mem.bytes = (u8 *) p;
mem._handle = h;
return mem;
}
s32 kit_shared_memory_close(kit_shared_memory_t *mem) {
assert(mem != NULL);
i32 status = KIT_OK;
if (!UnmapViewOfFile(mem->bytes))
status |= KIT_ERROR_UNMAP_FAILED;
if (!CloseHandle(mem->_handle))
status |= KIT_ERROR_UNLINK_FAILED;
return status;
}
s32 kit_shared_memory_clean(kit_str_t name) {
// Do nothing.
//
(void) name;
return KIT_OK;
}
#endif
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