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authorMitya Selivanov <automainint@guattari.tech>2024-07-14 21:12:37 +0200
committerMitya Selivanov <automainint@guattari.tech>2024-07-14 21:12:37 +0200
commit30740ca4131d1f574718262451b4410207dc8d4e (patch)
treefc88b16a216079397ad85b9c6b1a1c1c5712a814 /kit/shared_memory.win32.c
parent5e3c99bb1cf1d03ea006300121265571f5008fd2 (diff)
downloadsaw-30740ca4131d1f574718262451b4410207dc8d4e.zip
Reworking the build system
Diffstat (limited to 'kit/shared_memory.win32.c')
-rw-r--r--kit/shared_memory.win32.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/kit/shared_memory.win32.c b/kit/shared_memory.win32.c
new file mode 100644
index 0000000..f1d24d0
--- /dev/null
+++ b/kit/shared_memory.win32.c
@@ -0,0 +1,91 @@
+#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