various updates

meson.build

@@ -49,16 +49,20 @@ runtime_lib = library('vyrt',
   'src/runtime/threading.h',
   'src/runtime/app.h',
   'src/runtime/dynamic_libs.h',
+  'src/runtime/jobs.h',
 
   'src/runtime/error_report.c',
   'src/runtime/gfx_main.c',
   'src/runtime/gfx_shader_loading.c',
   'src/runtime/config.c',
   'src/runtime/runtime_cvars.c',
-  'src/runtime/threading.c',
+  'src/runtime/threading_mutex.c',
+  'src/runtime/threading_thread.c',
+  'src/runtime/threading_cond.c',
   'src/runtime/fio.c',
   'src/runtime/app.c',
   'src/runtime/dynamic_libs.c',
+  'src/runtime/jobs.c',
 
   # Contrib Sources
   'contrib/xxhash/xxhash.c',
@@ -87,7 +91,7 @@ if vk_dep.found()
     # Contrib Sources
     'contrib/volk/volk.h',
     'contrib/volk/volk.c',
-    dependencies : [m_dep, vk_inc_dep],
+    dependencies : [m_dep, vk_inc_dep, windowing_dep],
     include_directories : incdir,
     link_with : [runtime_lib],
     c_pch : 'pch/vk_pch.h',

src/game/voyage.c

@@ -8,13 +8,14 @@
 int WINAPI wWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     PWSTR pCmdLine,
-                    int nCmdShow) {    return vyWin32Entry(hInstance, hPrevInstance, pCmdLine, nCmdShow);
+                    int nCmdShow) {
+    return vyWin32Entry(hInstance, hPrevInstance, pCmdLine, nCmdShow);
 }
 
 #elif defined(__linux__)
 
 int main(int argc, char **argv) {
-    return 0;
+    return vyXlibEntry(argc, argv);
 }
 
 #endif

src/renderer/vk/framebuffer.h

@@ -0,0 +1,22 @@
+#ifndef VY_VK_FRAMEBUFFER_H
+#define VY_VK_FRAMEBUFFER_H
+
+#include <volk/volk.h>
+
+typedef struct {
+    VkFramebuffer framebuffer;
+    uint32_t pass_idx;
+} vy_framebuffer;
+
+typedef struct {
+    uint32_t index;
+} vy_framebuffer_handle;
+
+/* Reserve a slot, but don't actually create the framebuffer yet.
+ * We can use this if we are unsure if the framebuffer will really be needed.
+ */
+vy_framebuffer_handle vy_reserve_framebuffer(void);
+
+vy_framebuffer *vy_get_framebuffer(vy_framebuffer_handle handle);
+
+#endif

src/renderer/vk/gfx_pipelines.c

@@ -1,5 +1,5 @@
-#include "runtime/runtime.h"
 #include "runtime/gfx.h"
+#include "runtime/runtime.h"
 
 #include "runtime/renderer_api.h"
 
@@ -17,7 +17,7 @@ typedef struct {
 
 static vy_pipeline_storage _storage;
 
-static vy_gfx_pipeline_id StorePipeline(vy_gl_pipeline pipeline) {
+static vy_gfx_pipeline_handle StorePipeline(vy_gl_pipeline pipeline) {
     /* Search for free slot */
     uint32_t slot = NUM_SLOTS;
     for (uint32_t i = 0; i < NUM_SLOTS; ++i) {
@@ -28,7 +28,7 @@ static vy_gfx_pipeline_id StorePipeline(vy_gl_pipeline pipeline) {
     }
     if (slot == NUM_SLOTS) {
         vyReportError("GL_GFX", "Ran out of pipeline storage slots");
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
 
     uint32_t generation = _storage.generation_in_use[slot] >> 1;
@@ -37,12 +37,12 @@ static vy_gfx_pipeline_id StorePipeline(vy_gl_pipeline pipeline) {
     _storage.pipelines[slot]         = pipeline;
     _storage.generation_in_use[slot] = (generation << 1) | 0x1;
 
-    vy_gfx_pipeline_id id;
+    vy_gfx_pipeline_handle id;
     id.index = (generation << 27) | slot;
     return id;
 }
 
-static void ReleasePipelineSlot(vy_gfx_pipeline_id id) {
+static void ReleasePipelineSlot(vy_gfx_pipeline_handle id) {
     uint32_t slot = id.index & 0x08ffffff;
     uint32_t gen  = (id.index >> 27) & 0x1f;
     if (slot >= NUM_SLOTS)
@@ -52,7 +52,7 @@ static void ReleasePipelineSlot(vy_gfx_pipeline_id id) {
         _storage.generation_in_use[slot] &= ~0x1;
 }
 
-VY_DLLEXPORT vy_gfx_pipeline_id
+VY_DLLEXPORT vy_gfx_pipeline_handle
 vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
 #if 0
     char info_log[512];
@@ -74,7 +74,7 @@ vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
                       info_log);
         glDeleteProgram(prog);
         glDeleteShader(shader);
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
     glAttachShader(prog, shader);
     glLinkProgram(prog);
@@ -84,7 +84,7 @@ vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
         vyReportError("GL_GFX", "Failed to link compute shader\n%s", info_log);
         glDeleteShader(shader);
         glDeleteProgram(prog);
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
     glDeleteShader(shader);
 #endif
@@ -94,7 +94,7 @@ vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
     return StorePipeline(pipeline);
 }
 
-VY_DLLEXPORT vy_gfx_pipeline_id
+VY_DLLEXPORT vy_gfx_pipeline_handle
 vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
 
 #if 0
@@ -118,7 +118,7 @@ vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
         glDeleteShader(vertex_shader);
         glDeleteShader(fragment_shader);
         glDeleteProgram(prog);
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
     glAttachShader(prog, vertex_shader);
 
@@ -134,7 +134,7 @@ vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
         glDeleteShader(fragment_shader);
         glDeleteShader(fragment_shader);
         glDeleteProgram(prog);
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
     glAttachShader(prog, fragment_shader);
 
@@ -146,7 +146,7 @@ vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
         glDeleteShader(vertex_shader);
         glDeleteShader(fragment_shader);
         glDeleteProgram(prog);
-        return (vy_gfx_pipeline_id){0};
+        return (vy_gfx_pipeline_handle){0};
     }
 
     glDeleteShader(vertex_shader);

src/renderer/vk/init.c

@@ -92,11 +92,11 @@ VY_DLLEXPORT void vyRegisterCVars(void) {
     vyRegisterCVAR(&r_VkPreferMailboxMode);
 }
 
-static int CreateInstance(void) {
+static vy_result CreateInstance(void) {
     VkResult result = volkInitialize();
     if (result != VK_SUCCESS) {
         vyReportError("vk", "Initialization failed: volkInitialize()");
-        return 0;
+        return 1;
     }
 
     VkApplicationInfo app_info = {
@@ -160,7 +160,7 @@ static int CreateInstance(void) {
     result = vkCreateInstance(&instance_info, g_gpu.alloc_cb, &g_gpu.instance);
     if (result != VK_SUCCESS) {
         vyReportError("vk", "Failed to create the vulkan instance.");
-        return -1;
+        return 1;
     }
     volkLoadInstance(g_gpu.instance);
 
@@ -179,10 +179,10 @@ static int CreateInstance(void) {
                                    g_gpu.alloc_cb,
                                    &g_gpu.messenger);
 #endif
-    return 0;
+    return VY_SUCCESS;
 }
 
-static int CreateSurface(const vy_renderer_init_info *info) {
+static vy_result CreateSurface(const vy_renderer_init_info *info) {
 #ifdef _WIN32
     g_gpu.native_window.hInstance            = info->hInstance;
     g_gpu.native_window.hWnd                 = info->hWnd;
@@ -195,9 +195,9 @@ static int CreateSurface(const vy_renderer_init_info *info) {
                                 &surface_info,
                                 g_gpu.alloc_cb,
                                 &g_gpu.surface) == VK_SUCCESS)
-        return 0;
+        return VY_SUCCESS;
     else
-        return -100;
+        return 100;
 #elif defined(VY_USE_XLIB_KHR)
     g_gpu.native_window.display             = info->display;
     g_gpu.native_window.window              = info->window;
@@ -210,9 +210,9 @@ static int CreateSurface(const vy_renderer_init_info *info) {
                                &surface_info,
                                &g_gpu.alloc_cb,
                                &g_gpu.surface) == VK_SUCCESS)
-        return 0;
+        return VY_SUCCESS;
     else
-        return -100;
+        return 100;
 #endif
 }
 
@@ -222,7 +222,8 @@ typedef struct {
     uint32_t present;
 } vy_queue_indices;
 
-static vy_queue_indices RetrieveQueueIndices(VkPhysicalDevice phys_dev, VkSurfaceKHR surface) {
+static vy_queue_indices RetrieveQueueIndices(VkPhysicalDevice phys_dev,
+                                             VkSurfaceKHR surface) {
     vy_queue_indices indices = {.graphics = UINT32_MAX,
                                 .compute  = UINT32_MAX,
                                 .present  = UINT32_MAX};
@@ -297,8 +298,7 @@ out:
     return supported;
 }
 
-static int ChoosePhysicalDevice(void) {
+static vy_result ChoosePhysicalDevice(void) {
-
 
     g_gpu.phys_device          = VK_NULL_HANDLE;
     uint32_t phys_device_count = 0;
@@ -306,7 +306,7 @@ static int ChoosePhysicalDevice(void) {
         vkEnumeratePhysicalDevices(g_gpu.instance, &phys_device_count, NULL);
     if (result != VK_SUCCESS) {
         vyReportError("vk", "Failed to enumerate the physical devices.");
-        return -2;
+        return 2;
     }
     VkPhysicalDevice *phys_devices =
         calloc(phys_device_count, sizeof(VkPhysicalDevice));
@@ -314,13 +314,12 @@ static int ChoosePhysicalDevice(void) {
         vyReportError(
             "vk",
             "Failed to enumerate the physical devices: Out of memory.");
-        return -2;
+        return 2;
     }
     vkEnumeratePhysicalDevices(g_gpu.instance,
                                &phys_device_count,
                                phys_devices);
 
-    
     uint32_t highscore  = 0;
     uint32_t best_index = phys_device_count;
     for (uint32_t i = 0; i < phys_device_count; ++i) {
@@ -392,12 +391,12 @@ static int ChoosePhysicalDevice(void) {
 
     if (g_gpu.phys_device == VK_NULL_HANDLE) {
         vyReportError("vk", "Failed to find a suitable physical device.");
-        return -3;
+        return 3;
     }
-    return 0;
+    return VY_SUCCESS;
 }
 
-static int CreateDevice(void) {
+static vy_result CreateDevice(void) {
     const char *extensions[] = {
         VK_KHR_SWAPCHAIN_EXTENSION_NAME,
     };
@@ -440,7 +439,6 @@ static int CreateDevice(void) {
         queue_info[distinct_queue_count].pQueuePriorities = &priority;
     }
 
-
     VkDeviceCreateInfo device_info = {
         .sType                   = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
         .enabledExtensionCount   = VY_ARRAY_COUNT(extensions),
@@ -453,7 +451,7 @@ static int CreateDevice(void) {
                        g_gpu.alloc_cb,
                        &g_gpu.device) != VK_SUCCESS) {
         vyReportError("vk", "Device creation failed.");
-        return -10;
+        return 10;
     }
 
     vkGetDeviceQueue(g_gpu.device,
@@ -469,10 +467,10 @@ static int CreateDevice(void) {
                      0,
                      &g_gpu.present_queue);
 
-    return 0;
+    return VY_SUCCESS;
 }
 
-VY_DLLEXPORT int vyInit(const vy_renderer_init_info *info) {
+VY_DLLEXPORT vy_result vyInit(const vy_renderer_init_info *info) {
     vyLog("vk", "Init");
 
     _tracking_alloc_cbs.pUserData       = NULL;
@@ -487,22 +485,22 @@ VY_DLLEXPORT int vyInit(const vy_renderer_init_info *info) {
     }
 
     int res = CreateInstance();
-    if (res != 0)
+    if (res != VY_SUCCESS)
         return res;
     res = CreateSurface(info);
-    if (res != 0)
+    if (res != VY_SUCCESS)
         return res;
     res = ChoosePhysicalDevice();
-    if (res != 0)
+    if (res != VY_SUCCESS)
         return res;
     res = CreateDevice();
-    if (res != 0)
+    if (res != VY_SUCCESS)
         return res;
     res = vyCreateSwapchain();
-    if (res != 0)
+    if (res != VY_SUCCESS)
         return res;
 
-    return 0;
+    return VY_SUCCESS;
 }
 
 VY_DLLEXPORT void vyShutdown(void) {

src/renderer/vk/swapchain.c

@@ -90,7 +90,7 @@ static vy_device_swapchain_parameters DetermineSwapchainParameters(void) {
 
 vy_swapchain g_swapchain;
 
-int vyCreateSwapchain(void) {
+vy_result vyCreateSwapchain(void) {
     vy_device_swapchain_parameters device_params =
         DetermineSwapchainParameters();
 
@@ -126,13 +126,12 @@ int vyCreateSwapchain(void) {
         swapchain_info.queueFamilyIndexCount = 0;
     }
 
-
     if (vkCreateSwapchainKHR(g_gpu.device,
                              &swapchain_info,
                              g_gpu.alloc_cb,
                              &g_swapchain.swapchain) != VK_SUCCESS) {
         vyReportError("vk", "Failed to create the swapchain");
-        return -50;
+        return 50;
     }
     g_swapchain.format = device_params.surface_format.format;
 
@@ -146,7 +145,7 @@ int vyCreateSwapchain(void) {
         vyReportError("vk",
                       "Unsupported number of swapchain images: %u",
                       g_swapchain.image_count);
-        return -51;
+        return 51;
     }
     vkGetSwapchainImagesKHR(g_gpu.device,
                             g_swapchain.swapchain,
@@ -160,13 +159,15 @@ int vyCreateSwapchain(void) {
             .image    = g_swapchain.images[i],
             .format   = g_swapchain.format,
             .viewType = VK_IMAGE_VIEW_TYPE_2D,
-            .components = {
+            .components =
+                {
                              .r = VK_COMPONENT_SWIZZLE_IDENTITY,
                              .g = VK_COMPONENT_SWIZZLE_IDENTITY,
                              .b = VK_COMPONENT_SWIZZLE_IDENTITY,
                              .a = VK_COMPONENT_SWIZZLE_IDENTITY,
                              },
-            .subresourceRange = {
+            .subresourceRange =
+                {
                              .aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT,
                              .baseArrayLayer = 0,
                              .layerCount     = 1,
@@ -180,13 +181,18 @@ int vyCreateSwapchain(void) {
                               &g_swapchain.image_views[i]) != VK_SUCCESS) {
             vyReportError("vk",
                           "Failed to create an image view for the swapchain.");
-            return -52;
+            return 52;
         }
     }
 
-    return 0;
+    return VY_SUCCESS;
 }
 
+vy_result vyRecreateSwapchain(void) {
+    /* TODO(Kevin): Old swapchain in swapchain create info */
+    vyDestroySwapchain();
+    return vyCreateSwapchain();
+}
 
 void vyDestroySwapchain(void) {
     for (uint32_t i = 0; i < g_swapchain.image_count; ++i) {

src/renderer/vk/swapchain.h

@@ -3,6 +3,8 @@
 
 #include <volk/volk.h>
 
+#include "runtime/runtime.h"
+
 #define VY_VK_MAX_SWAPCHAIN_IMAGES 3
 
 typedef struct {
@@ -17,7 +19,9 @@ typedef struct {
 extern vy_swapchain g_swapchain;
 #endif
 
-int vyCreateSwapchain(void);
+vy_result vyCreateSwapchain(void);
+
+vy_result vyRecreateSwapchain(void);
 
 void vyDestroySwapchain(void);
 

src/runtime/app.c

@@ -1,7 +1,7 @@
 #include "app.h"
+#include "config.h"
 #include "fio.h"
 #include "gfx.h"
-#include "config.h"
 #include "renderer_api.h"
 
 extern void __RegisterRuntimeCVars(void);
@@ -43,7 +43,6 @@ VY_DLLEXPORT int vyWin32Entry(HINSTANCE hInstance,
         return 1;
     }
 
-    
     WNDCLASSEXW wndclass = {
         .cbSize        = sizeof(wndclass),
         .hInstance     = hInstance,
@@ -130,4 +129,129 @@ VY_DLLEXPORT int vyWin32Entry(HINSTANCE hInstance,
     return 0;
 }
 
+#elif defined(VY_USE_XLIB)
+
+    #include <X11/Xlib.h>
+    #include <assert.h>
+
+static void
+xlibSetFullscreen(Display *dpy, int screen, Window window, bool enable) {
+    Atom wm_state      = XInternAtom(dpy, "_NET_W_STATE", False);
+    Atom wm_fullscreen = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
+    if (wm_state == None || wm_fullscreen == None) {
+        vyLog("CORE", "Window manager does not support fullscreen mode.");
+        return;
+    }
+
+    #define _NET_WM_STATE_REMOVE     0
+    #define _NET_WM_STATE_ADD        1
+    #define EVENT_SOURCE_APPLICATION 1
+    XEvent ev;
+    ev.type                 = ClientMessage;
+    ev.xclient.display      = dpy;
+    ev.xclient.window       = window;
+    ev.xclient.message_type = wm_state;
+    ev.xclient.format       = 32;
+    ev.xclient.data.l[0] = (enable) ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
+    ev.xclient.data.l[1] = wm_fullscreen;
+    ev.xclient.data.l[2] = 0;
+    ev.xclient.data.l[3] = EVENT_SOURCE_APPLICATION;
+    ev.xclient.data.l[4] = 0;
+
+    Window root_window = XRootWindow(dpy, screen);
+    long ev_mask       = SubstructureRedirectMask;
+
+    if (!XSendEvent(dpy, root_window, False, ev_mask, &ev)) {
+        vyReportError("CORE", "Failed to send x11 fullscreen event.");
+    }
+
+    #undef _NET_WM_STATE_ADD
+    #undef _NET_WM_STATE_REMOVE
+    #undef EVENT_SOURCE_APPLICATION
+}
+
+VY_DLLEXPORT int vyXlibEntry(int argc, char **argv) {
+    __RegisterRuntimeCVars();
+    vyRegisterRendererCVars();
+
+    vy_fio_config fio_config = {0};
+    if (!vyInitFIO(&fio_config)) {
+        vyReportError("FIO", "Init failed.");
+        return 1;
+    }
+
+    Display *dpy = XOpenDisplay(NULL);
+    if (!dpy) {
+        vyReportError("CORE", "Failed to open default display");
+        return 1;
+    }
+    int screen = DefaultScreen(dpy);
+    Window window;
+    int w  = rt_WindowWidth.i;
+    int h  = rt_WindowHeight.i;
+    window = XCreateSimpleWindow(dpy,
+                                 RootWindow(dpy, screen),
+                                 10,
+                                 10,
+                                 w,
+                                 h,
+                                 1,
+                                 BlackPixel(dpy, screen),
+                                 WhitePixel(dpy, screen));
+    XSelectInput(dpy, window, KeyPressMask);
+    XMapWindow(dpy, window);
+    XStoreName(dpy, window, "Voyage");
+
+    Atom wm_close = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+    if (!wm_close) {
+        vyReportError("CORE", "Failed to find WM_DELETE_WINDOW atom.");
+        XDestroyWindow(dpy, window);
+        XCloseDisplay(dpy);
+        return 1;
+    }
+    XSetWMProtocols(dpy, window, &wm_close, 1);
+
+    if (rt_Fullscreen.i)
+        xlibSetFullscreen(dpy, screen, window, true);
+
+    vy_renderer_init_info renderer_info = {.display = dpy, .window = window};
+    if (!vyInitGFX(&renderer_info)) {
+        vyReportError("GFX", "Init failed.");
+        return 1;
+    }
+
+    /* Main Loop */
+    bool keep_running = true;
+    while (keep_running) {
+        while (XEventsQueued(dpy, QueuedAlready) > 0) {
+            XEvent event;
+            XNextEvent(dpy, &event);
+            switch (event.type) {
+            case KeyPress:
+                break;
+            case ButtonPressMask:
+                /* Mouse down */
+                break;
+            case PointerMotionMask:
+                /* Mouse movement */
+                break;
+            case ClientMessage:
+                if (event.xclient.data.l[0] == (long)wm_close) {
+                    vyLog("CORE", "Received WM_DELETE_WINDOW");
+                    keep_running = false;
+                }
+                break;
+            }
+        }
+    }
+
+    vyShutdownGFX();
+    XDestroyWindow(dpy, window);
+    XCloseDisplay(dpy);
+
+    vyShutdownFIO();
+
+    return 0;
+}
+
 #endif

src/runtime/app.h

@@ -15,6 +15,10 @@ VY_DLLEXPORT int vyWin32Entry(struct HINSTANCE__ *hInstance,
                               wchar_t *pCmdLine,
                               int nCmdShow);
 
+#elif defined(VY_USE_XLIB)
+
+VY_DLLEXPORT int vyXlibEntry(int argc, char **argv);
+
 #endif
 
 #endif

src/runtime/dynamic_libs.h

@@ -4,9 +4,13 @@
 #include "runtime.h"
 
 #ifdef _WIN32
-    #define VY_DLLNAME(s) (s".dll")
+    #define VY_DLLNAME(s)                                                      \
+        (".\\"s                                                                \
+         ".dll")
 #elif defined(__linux__)
-    #define VY_DLLNAME(s) ("lib"s".so")
+    #define VY_DLLNAME(s)                                                      \
+        ("./lib"s                                                              \
+         ".so")
 #endif
 
 typedef void *vy_dynlib;

src/runtime/fio.h

@@ -7,8 +7,7 @@
 
 #include "runtime.h"
 
-enum
+enum {
-{
     VY_FILE_BUFFER_FLAG_FILE_NOT_FOUND = 0x1,
     VY_FILE_BUFFER_FLAG_READ_FAILED    = 0x2,
 };
@@ -19,7 +18,7 @@ typedef struct {
     uint32_t flags;
 } vy_file_buffer;
 
-inline bool vyWasFileBufferSuccessful(const vy_file_buffer *fb) {
+static inline bool vyWasFileBufferSuccessful(const vy_file_buffer *fb) {
     return fb->flags == 0;
 }
 

src/runtime/gfx.h

@@ -9,8 +9,8 @@
  * - object renderer (for static models)
  */
 
-#include <stdint.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 #include "runtime.h"
 
@@ -23,12 +23,11 @@ VY_DLLEXPORT bool vyInitGFX(vy_renderer_init_info *renderer_info);
 
 VY_DLLEXPORT void vyShutdownGFX(void);
 
-/* Generational indices for backend objects */
+/* Handles backend objects */
+
 typedef struct {
     uint32_t index;
-} vy_gfx_pipeline_id;
+} vy_gfx_pipeline_handle;
-
-#define VY_IS_GFX_ID_VALID(id) ((id).index != 0)
 
 /* Attributes are used to bind buffers (or textures) to symbolic values.
  * For example, an attribute might be bound to "CELL_GRID", which would be
@@ -52,7 +51,7 @@ typedef struct {
     vy_attribute_binding *storage_bindings;
     vy_attribute_binding *texture_bindings;
 
-    vy_gfx_pipeline_id pipeline;
+    vy_gfx_pipeline_handle pipeline;
 
     unsigned int uniform_binding_count;
     unsigned int storage_binding_count;

src/runtime/gfx_main.c

@@ -2,10 +2,10 @@
 
 #define VY_DONT_DEFINE_RENDERER_GLOBAL
 
-#include "gfx.h"
-#include "renderer_api.h"
 #include "config.h"
 #include "dynamic_libs.h"
+#include "gfx.h"
+#include "renderer_api.h"
 
 /* Attributes are used to bind buffers (or textures) to symbolic values.
  * For example, an attribute might be bound to "CELL_GRID", which would be
@@ -21,17 +21,18 @@ VY_CVAR_S(rt_Renderer,
           "Select the render backend. Available options: [vk], Default: vk",
           "vk");
 
-extern bool vyLoadShaders(const char **paths, vy_shader *shaders, unsigned int count);
+extern bool
+vyLoadShaders(const char **paths, vy_shader *shaders, unsigned int count);
 
-static bool LoadRenderer(void)
+static bool LoadRenderer(void) {
-{
 #define RETRIEVE_SYMBOL(name, type)                                            \
     g_renderer.name = (type *)vyGetSymbol(_renderer_lib, "vy" #name);          \
     if (!g_renderer.name) {                                                    \
         vyReportError(                                                         \
             "GFX",                                                             \
             "Unable to retrieve renderer function %s from backend %s",         \
-            #name, rt_Renderer.s); \
+            #name,                                                             \
+            rt_Renderer.s);                                                    \
     }
 
     if (strcmp(rt_Renderer.s, "vk") == 0) {
@@ -50,14 +51,16 @@ static bool LoadRenderer(void)
                         vy_compile_graphics_pipeline_fn);
         return true;
     } else {
-        vyReportError("GFX", "Unsupported renderer backend: (%s) %s", rt_Renderer.name, rt_Renderer.s);
+        vyReportError("GFX",
+                      "Unsupported renderer backend: (%s) %s",
+                      rt_Renderer.name,
+                      rt_Renderer.s);
         return false;
     }
 #undef RETRIEVE_SYMBOL
 }
 
-VY_DLLEXPORT void vyRegisterRendererCVars(void)
+VY_DLLEXPORT void vyRegisterRendererCVars(void) {
-{
     if (!_renderer_loaded) {
         if (!LoadRenderer())
             return;
@@ -73,7 +76,7 @@ VY_DLLEXPORT bool vyInitGFX(vy_renderer_init_info *renderer_info) {
         g_renderer.RegisterCVars();
     }
 
-    if (g_renderer.Init(renderer_info) != 0)
+    if (g_renderer.Init(renderer_info) != VY_SUCCESS)
         return false;
 
     /* Init shader programs */

src/runtime/gfx_shader_loading.c

@@ -6,10 +6,11 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "runtime.h"
 #include "fio.h"
 #include "gfx.h"
+#include "handles.h"
 #include "renderer_api.h"
+#include "runtime.h"
 
 typedef enum {
     VY_STMT_FORM_VALUE,
@@ -289,7 +290,7 @@ static vy_fio_handle DispatchShaderRead(const char *shader,
     return DispatchFileRead(path->value);
 }
 
-static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
+static vy_gfx_pipeline_handle CreatePipeline(vy_parse_state *state,
                                              const char *file_path,
                                              unsigned int root_list) {
     /* Process the data */
@@ -309,22 +310,24 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
             vyAbortFIO(vertex_read);
             vyAbortFIO(fragment_read);
             vyAbortFIO(compute_read);
-            return (vy_gfx_pipeline_id){0};
+            return (vy_gfx_pipeline_handle){0};
         }
         while (!vyIsFIOFinished(compute_read)) {
             /* wait */
         }
         vy_file_buffer compute_code;
-        if (!vyRetrieveReadBuffer(compute_read, &compute_code) || !vyWasFileBufferSuccessful(&compute_code)) {
+        if (!vyRetrieveReadBuffer(compute_read, &compute_code) ||
+            !vyWasFileBufferSuccessful(&compute_code)) {
             vyReportError("GFX",
                           "Failed to load compute shader required by: %s",
                           file_path);
-            return (vy_gfx_pipeline_id){0};
+            return (vy_gfx_pipeline_handle){0};
         }
         vy_compute_pipeline_info info;
         info.compute_source        = compute_code.data;
         info.compute_source_length = compute_code.size;
-        vy_gfx_pipeline_id pipeline = g_renderer.CompileComputePipeline(&info);
+        vy_gfx_pipeline_handle pipeline =
+            g_renderer.CompileComputePipeline(&info);
         vyFreeFileBuffer(compute_code);
         return pipeline;
     } else if (vertex_read || fragment_read) {
@@ -336,7 +339,7 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
             vyAbortFIO(vertex_read);
             vyAbortFIO(fragment_read);
             vyAbortFIO(compute_read);
-            return (vy_gfx_pipeline_id){0};
+            return (vy_gfx_pipeline_handle){0};
         }
         if (!vertex_read || !fragment_read) {
             vyReportError("GFX",
@@ -346,7 +349,7 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
             vyAbortFIO(vertex_read);
             vyAbortFIO(fragment_read);
             vyAbortFIO(compute_read);
-            return (vy_gfx_pipeline_id){0};
+            return (vy_gfx_pipeline_handle){0};
         }
 
         vy_graphics_pipeline_info info;
@@ -356,13 +359,14 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
         int remaining = 2;
         while (remaining > 0) {
             if (vyIsFIOFinished(vertex_read)) {
-                if (!vyRetrieveReadBuffer(vertex_read, &vertex_code) || !vyWasFileBufferSuccessful(&vertex_code)) {
+                if (!vyRetrieveReadBuffer(vertex_read, &vertex_code) ||
+                    !vyWasFileBufferSuccessful(&vertex_code)) {
                     vyReportError(
                         "GFX",
                         "Failed to load vertex shader required by: %s",
                         file_path);
                     vyFreeFileBuffer(fragment_code);
-                    return (vy_gfx_pipeline_id){0};
+                    return (vy_gfx_pipeline_handle){0};
                 }
                 info.vertex_source        = vertex_code.data;
                 info.vertex_source_length = vertex_code.size;
@@ -371,13 +375,14 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
             }
 
             if (vyIsFIOFinished(fragment_read)) {
-                if (!vyRetrieveReadBuffer(fragment_read, &fragment_code) || !vyWasFileBufferSuccessful(&fragment_code)) {
+                if (!vyRetrieveReadBuffer(fragment_read, &fragment_code) ||
+                    !vyWasFileBufferSuccessful(&fragment_code)) {
                     vyReportError(
                         "GFX",
                         "Failed to load fragment shader required by: %s",
                         file_path);
                     vyFreeFileBuffer(vertex_code);
-                    return (vy_gfx_pipeline_id){0};
+                    return (vy_gfx_pipeline_handle){0};
                 }
                 info.fragment_source        = fragment_code.data;
                 info.fragment_source_length = fragment_code.size;
@@ -386,7 +391,8 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
             }
         }
 
-        vy_gfx_pipeline_id pipeline = g_renderer.CompileGraphicsPipeline(&info);
+        vy_gfx_pipeline_handle pipeline =
+            g_renderer.CompileGraphicsPipeline(&info);
         vyFreeFileBuffer(vertex_code);
         vyFreeFileBuffer(fragment_code);
         return pipeline;
@@ -399,7 +405,7 @@ static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
         vyAbortFIO(fragment_read);
         vyAbortFIO(compute_read);
     }
-    return (vy_gfx_pipeline_id){0};
+    return (vy_gfx_pipeline_handle){0};
 }
 
 static bool ParseBindingIndex(vy_text_span span, unsigned int *index) {
@@ -516,7 +522,7 @@ ParseShaderFile(vy_file_id fid, vy_file_buffer fbuf, vy_shader *shader) {
     DbgPrintShaderFile(&state, root_list, 0);
 
     shader->pipeline = CreatePipeline(&state, file_path, root_list);
-    if (!VY_IS_GFX_ID_VALID(shader->pipeline)) {
+    if (!VY_IS_HANDLE_VALID(shader->pipeline)) {
         result = false;
         goto out;
     }

src/runtime/handles.h

@@ -0,0 +1,8 @@
+#ifndef VY_HANDLES_H
+#define VY_HANDLES_H
+
+/* All handle types should contain a uint32_t index */
+
+#define VY_IS_HANDLE_VALID(handle) ((handle).index != 0)
+
+#endif

src/runtime/jobs.c

@@ -0,0 +1,65 @@
+#include "jobs.h"
+#include "threading.h"
+
+#define MAX_WORKERS    32
+#define JOB_QUEUE_SIZE 2048
+
+/* A "chunk" of iterations for a particular job */
+typedef struct {
+    uint32_t base_iteration;
+    uint32_t iteration_count;
+    vy_job_fn *fn;
+    void *param;
+} vy_job_chunk;
+
+typedef struct {
+    /* Queue */
+    struct {
+        vy_job_chunk *chunks;
+        unsigned int head;
+        unsigned int tail;
+        vy_condition_var *lock;
+    } job_queue;
+
+    /* Thread data */
+    vy_thread *thread;
+} vy_worker_data;
+
+static volatile bool _keep_running = true;
+static vy_worker_data _worker_data[MAX_WORKERS];
+
+static void ExecOneJobIfAvailable(vy_worker_data *wd) {
+    if (wd->job_queue.head == wd->job_queue.tail) {
+        /* No job available.
+         * TODO: Pick one job queue at random and check if we can steal?
+         */
+        return;
+    }
+
+    vy_job_chunk chunk = wd->job_queue.chunks[wd->job_queue.head];
+    wd->job_queue.head = (wd->job_queue.head + 1) % JOB_QUEUE_SIZE;
+    for (uint32_t i = 0; i < chunk.iteration_count; ++i) {
+        chunk.fn(chunk.param, chunk.base_iteration + i);
+    }
+}
+
+static void WorkerEntry(void *param) {
+    vy_worker_data *wd = param;
+    while (_keep_running) {
+        vyLockConditionVar(wd->job_queue.lock);
+        while (wd->job_queue.head == wd->job_queue.tail && _keep_running) {
+            vyWaitOnConditionVar(wd->job_queue.lock);
+        }
+        ExecOneJobIfAvailable(wd);
+        vyUnlockConditionVar(wd->job_queue.lock, false);
+    }
+}
+
+void vyInitJobSystem(unsigned int worker_count) {
+    if (worker_count > MAX_WORKERS)
+        worker_count = MAX_WORKERS;
+
+    for (unsigned int i = 0; i < worker_count; ++i) {
+        _worker_data[i].thread = vySpawnThread(WorkerEntry, &_worker_data[i]);
+    }
+}

src/runtime/jobs.h

@@ -0,0 +1,20 @@
+#ifndef VY_JOBS_H
+#define VY_JOBS_H
+
+/* Work stealing job scheduler */
+
+#include "runtime.h"
+
+#include <stdint.h>
+
+typedef void vy_job_fn(void *param, uint32_t iteration);
+
+typedef struct {
+    uint32_t iterations;
+    vy_job_fn *fn;
+    void *param;
+} vy_job_decl;
+
+VY_DLLEXPORT void vyDispatchJob(const vy_job_decl *decl);
+
+#endif

src/runtime/renderer_api.h

@@ -6,6 +6,7 @@
 #include <stddef.h>
 
 #include "gfx.h"
+#include "runtime.h"
 
 #ifdef _WIN32
 struct HINSTANCE__;
@@ -38,11 +39,11 @@ typedef struct {
 } vy_graphics_pipeline_info;
 
 typedef void vy_register_renderer_cvars_fn(void);
-typedef int vy_init_renderer_fn(const vy_renderer_init_info *info);
+typedef vy_result vy_init_renderer_fn(const vy_renderer_init_info *info);
 typedef void vy_shutdown_renderer_fn(void);
-typedef vy_gfx_pipeline_id
+typedef vy_gfx_pipeline_handle
 vy_compile_compute_pipeline_fn(const vy_compute_pipeline_info *info);
-typedef vy_gfx_pipeline_id
+typedef vy_gfx_pipeline_handle
 vy_compile_graphics_pipeline_fn(const vy_graphics_pipeline_info *info);
 
 typedef struct {

src/runtime/runtime.h

@@ -14,6 +14,9 @@
 #define VY_UNUSED(x)      ((void)sizeof((x)))
 #define VY_ARRAY_COUNT(x) (sizeof((x)) / sizeof((x)[0]))
 
+typedef unsigned int vy_result;
+#define VY_SUCCESS 0
+
 typedef struct {
     const char *start;
     unsigned int length;

src/runtime/threading.h

@@ -17,4 +17,25 @@ VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex);
 
 VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex);
 
+typedef struct vy_condition_var_s vy_condition_var;
+
+VY_DLLEXPORT vy_condition_var *vyCreateConditionVar(void);
+
+VY_DLLEXPORT void vyDestroyConditionVar(vy_condition_var *var);
+
+VY_DLLEXPORT void vyLockConditionVar(vy_condition_var *var);
+
+VY_DLLEXPORT void vyUnlockConditionVar(vy_condition_var *var, bool signal);
+
+/* The condition variable must be locked by the thread! */
+VY_DLLEXPORT void vyWaitOnConditionVar(vy_condition_var *var);
+
+typedef struct vy_thread_s vy_thread;
+
+typedef void vy_thread_entry_fn(void *param);
+
+VY_DLLEXPORT vy_thread *vySpawnThread(vy_thread_entry_fn *entry, void *param);
+
+VY_DLLEXPORT void vyJoinThread(vy_thread *thread);
+
 #endif

src/runtime/threading_cond.c

@@ -0,0 +1,68 @@
+#include "runtime.h"
+#include "threading.h"
+
+#ifdef __linux__
+
+    #include <pthread.h>
+struct vy_condition_var_s {
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+    ptrdiff_t next_reusable;
+};
+
+    #define MAX_CONDS 1024
+vy_condition_var _conds[MAX_CONDS];
+static ptrdiff_t _first_reusable = MAX_CONDS;
+static ptrdiff_t _next           = 0;
+static pthread_mutex_t _guard    = PTHREAD_MUTEX_INITIALIZER;
+
+VY_DLLEXPORT vy_condition_var *vyCreateConditionVar(void) {
+    pthread_mutex_lock(&_guard);
+    if (_first_reusable < MAX_CONDS) {
+        vy_condition_var *cond = &_conds[_first_reusable];
+        _first_reusable        = cond->next_reusable;
+        pthread_mutex_unlock(&_guard);
+        return cond;
+    } else if (_next < MAX_CONDS) {
+        vy_condition_var *cond = &_conds[_next];
+        if (pthread_mutex_init(&cond->mutex, NULL) != 0) {
+            vyLog("core", "Condition variable creation failed");
+            pthread_mutex_unlock(&_guard);
+            return NULL;
+        }
+        if (pthread_cond_init(&cond->cond, NULL) != 0) {
+            vyLog("core", "Condition variable creation failed");
+        }
+        cond->next_reusable = MAX_CONDS;
+        ++_next;
+        pthread_mutex_unlock(&_guard);
+        return cond;
+    }
+    vyReportError("core", "Ran out of condition variable objects");
+    pthread_mutex_unlock(&_guard);
+    return NULL;
+}
+
+VY_DLLEXPORT void vyDestroyConditionVar(vy_condition_var *var) {
+    ptrdiff_t index = var - &_conds[0];
+    pthread_mutex_lock(&_guard);
+    var->next_reusable = _first_reusable;
+    _first_reusable    = index;
+    pthread_mutex_unlock(&_guard);
+}
+
+VY_DLLEXPORT void vyLockConditionVar(vy_condition_var *var) {
+    pthread_mutex_lock(&var->mutex);
+}
+
+VY_DLLEXPORT void vyUnlockConditionVar(vy_condition_var *var, bool signal) {
+    if (signal)
+        pthread_cond_signal(&var->cond);
+    pthread_mutex_unlock(&var->mutex);
+}
+
+VY_DLLEXPORT void vyWaitOnConditionVar(vy_condition_var *var) {
+    pthread_cond_wait(&var->cond, &var->mutex);
+}
+
+#endif

src/runtime/threading_mutex.c

@@ -1,5 +1,5 @@
-#include "threading.h"
 #include "runtime.h"
+#include "threading.h"
 
 #ifdef _WIN32
     #define WIN32_LEAN_AND_MEAN
@@ -44,8 +44,7 @@ VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
 VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {
     return WaitForSingleObject(mutex->handle, INFINITE) == WAIT_OBJECT_0;
 }
-
+v VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
-VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
     return ReleaseMutex(mutex->handle) != 0;
 }
 
@@ -61,30 +60,38 @@ struct vy_mutex_s {
 static vy_mutex _mutex[MAX_MUTEX];
 static ptrdiff_t _first_reusable = MAX_MUTEX;
 static ptrdiff_t _next           = 0;
+static pthread_mutex_t _guard    = PTHREAD_MUTEX_INITIALIZER;
 
 VY_DLLEXPORT vy_mutex *vyCreateMutex(void) {
+    pthread_mutex_lock(&_guard);
     if (_first_reusable < MAX_MUTEX) {
         vy_mutex *mtx   = &_mutex[_first_reusable];
         _first_reusable = mtx->next_reusable;
+        pthread_mutex_unlock(&_guard);
         return mtx;
     } else if (_next < MAX_MUTEX) {
         vy_mutex *mtx = &_mutex[_next];
         if (pthread_mutex_init(&mtx->handle, NULL) != 0) {
             vyLog("core", "Mutex creation failed");
+            pthread_mutex_unlock(&_guard);
             return NULL;
         }
         mtx->next_reusable = MAX_MUTEX;
         ++_next;
+        pthread_mutex_unlock(&_guard);
         return mtx;
     }
     vyReportError("core", "Ran out of mutex objects");
+    pthread_mutex_unlock(&_guard);
     return NULL;
 }
 
 VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
     ptrdiff_t index = mutex - &_mutex[0];
+    pthread_mutex_lock(&_guard);
     mutex->next_reusable = _first_reusable;
     _first_reusable      = index;
+    pthread_mutex_unlock(&_guard);
 }
 
 VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {

src/runtime/threading_thread.c

@@ -0,0 +1,74 @@
+#include "runtime.h"
+#include "threading.h"
+
+#if defined(_WIN32)
+#elif defined(__linux__)
+
+    #include <pthread.h>
+
+struct vy_thread_s {
+    pthread_t handle;
+    ptrdiff_t next_reusable;
+
+    vy_thread_entry_fn *entry;
+    void *param;
+
+    bool needs_join;
+};
+
+    #define MAX_THREADS 256
+static vy_thread _threads[MAX_THREADS];
+static ptrdiff_t _first_reusable = MAX_THREADS;
+static ptrdiff_t _next           = 0;
+
+static pthread_mutex_t _guard = PTHREAD_MUTEX_INITIALIZER;
+
+static void *linuxThreadWrapper(void *arg) {
+    vy_thread *user_thread  = arg;
+    user_thread->needs_join = false;
+    user_thread->entry(user_thread->param);
+    user_thread->needs_join = true;
+    return NULL;
+}
+
+VY_DLLEXPORT vy_thread *vySpawnThread(vy_thread_entry_fn *entry, void *param) {
+    vy_thread *thrd = NULL;
+    pthread_mutex_lock(&_guard);
+    if (_first_reusable < MAX_THREADS) {
+        thrd            = &_threads[_first_reusable];
+        _first_reusable = thrd->next_reusable;
+        if (thrd->needs_join) {
+            pthread_join(thrd->handle, NULL);
+            thrd->needs_join = false;
+        }
+    } else if (_next < MAX_THREADS) {
+        thrd                = &_threads[_next];
+        thrd->next_reusable = MAX_THREADS;
+        ++_next;
+    }
+    if (thrd) {
+        thrd->entry = entry;
+        thrd->param = param;
+        if (pthread_create(&thrd->handle, NULL, linuxThreadWrapper, thrd) !=
+            0) {
+            vyLog("core", "Mutex creation failed");
+            thrd = NULL;
+        }
+    } else {
+        vyReportError("core", "Ran out of thread objects");
+    }
+    pthread_mutex_unlock(&_guard);
+    return thrd;
+}
+
+VY_DLLEXPORT void vyJoinThread(vy_thread *thread) {
+    pthread_join(thread->handle, NULL);
+    thread->needs_join = false;
+    ptrdiff_t index    = thread - &_threads[0];
+    pthread_mutex_lock(&_guard);
+    thread->next_reusable = _first_reusable;
+    _first_reusable       = index;
+    pthread_mutex_unlock(&_guard);
+}
+
+#endif