socket progress

build.c

@@ -725,12 +725,14 @@ void OnBuild(StringList cli_args)
                 Bool is_cpp = !is_dir && !is_c && StringEqual(extension, Lit("cpp"));
                 if (is_c || is_cpp) {
                     if (StringBeginsWith(name, Lit("sys_")) ||
+                        StringBeginsWith(name, Lit("sock_")) ||
                         StringBeginsWith(name, Lit("renderer_")) ||
                         StringBeginsWith(name, Lit("playback_")) ||
                         StringBeginsWith(name, Lit("mp3_")) ||
                         StringBeginsWith(name, Lit("ttf_"))) {
                         if (PlatformWindows) {
                             ignore = !(StringEqual(name, Lit("sys_win32.c")) ||
+                                       StringEqual(name, Lit("sock_win32.c")) ||
                                        StringEqual(name, Lit("renderer_d3d11.c")) ||
                                        StringEqual(name, Lit("playback_wasapi.c")) ||
                                        StringEqual(name, Lit("mp3_mmf.c")) ||

src/app.c

@@ -22,6 +22,7 @@
 #include "renderer.h"
 #include "phys.h"
 #include "rng.h"
+#include "sock.h"
 
 struct exit_callback {
     app_exit_callback_func *func;
@@ -122,6 +123,45 @@ void app_register_exit_callback(app_exit_callback_func *func)
  * Entry point
  * ========================== */
 
+
+
+
+
+
+
+
+
+INTERNAL SOCK_RECEIVE_CALLBACK_FUNC_DEF(server_recv, address, msg)
+{
+    (UNUSED)address;
+    (UNUSED)msg;
+    DEBUGBREAKABLE;
+}
+
+INTERNAL SOCK_RECEIVE_CALLBACK_FUNC_DEF(client_recv, address, msg)
+{
+    (UNUSED)address;
+    (UNUSED)msg;
+    DEBUGBREAKABLE;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
 void app_entry_point(void)
 {
     struct temp_arena scratch = scratch_begin_no_conflict();
@@ -205,6 +245,7 @@ void app_entry_point(void)
     }
 
     /* Startup systems */
+    struct sock_startup_receipt sock_sr = sock_startup();
     struct resource_startup_receipt resource_sr = resource_startup();
     struct rng_startup_receipt rng_sr = rng_startup(&resource_sr);
     struct renderer_startup_receipt renderer_sr = renderer_startup(&window);
@@ -217,10 +258,11 @@ void app_entry_point(void)
     struct sound_startup_receipt sound_sr = sound_startup(&work_sr, &asset_cache_sr, &resource_sr);
     struct draw_startup_receipt draw_sr = draw_startup(&renderer_sr, &font_sr);
     struct phys_startup_receipt phys_sr = phys_startup();
-    struct game_startup_receipt game_sr = game_startup(&mixer_sr, &sprite_sr, &sound_sr, &phys_sr);
+    struct game_startup_receipt game_sr = game_startup(&mixer_sr, &sprite_sr, &sound_sr, &phys_sr, &sock_sr);
-    struct user_startup_receipt user_sr = user_startup(&work_sr, &renderer_sr, &font_sr, &sprite_sr, &draw_sr, &game_sr, &asset_cache_sr, &mixer_sr, &window);
+    struct user_startup_receipt user_sr = user_startup(&work_sr, &renderer_sr, &font_sr, &sprite_sr, &draw_sr, &game_sr, &asset_cache_sr, &mixer_sr, &sock_sr, &window);
     struct playback_startup_receipt playback_sr = playback_startup(&mixer_sr);
 
+    (UNUSED)sock_sr;
     (UNUSED)user_sr;
     (UNUSED)playback_sr;
     (UNUSED)rng_sr;

src/common.h

@@ -377,8 +377,8 @@ GLOBAL const f64 *_f64_nan          = (f64 *)&_f64_nan_u64;
 #if COMPILER_CLANG
 
 #define U128(hi64, lo64) (((u128)(hi64) << 64) | (lo64))
-#define U128_HI64(a) ((u64)((a) >> 64))
+#define U128_HI(a) ((u64)((a) >> 64))
-#define U128_LO64(a) ((u64)(a))
+#define U128_LO(a) ((u64)(a))
 
 typedef __uint128_t u128;
 
@@ -395,8 +395,8 @@ INLINE u128 u128_mul(u128 a, u128 b) { return a * b; }
 #else
 # define U128(hi64, lo64) ((u128) { .hi = (hi64), .lo = (lo64) })
 #endif
-#define U128_HI64(a) ((a).hi)
+#define U128_HI(a) ((a).hi)
-#define U128_LO64(a) ((a).lo)
+#define U128_LO(a) ((a).lo)
 
 typedef struct { u64 hi; u64 lo; } u128;
 

src/font.c

@@ -97,7 +97,7 @@ INTERNAL WORK_TASK_FUNC_DEF(font_load_asset_task, vparams)
     struct temp_arena scratch = scratch_begin_no_conflict();
 
     struct font_task_params *params = (struct font_task_params *)vparams;
-    struct string path = string_from_cstr_len(params->path_cstr, params->path_len);
+    struct string path = STRING(params->path_len, (u8 *)params->path_cstr);
     f32 point_size = params->point_size;
     struct asset *asset = params->asset;
 

src/game.c

@@ -15,6 +15,7 @@
 #include "rng.h"
 #include "space.h"
 #include "byteio.h"
+#include "sock.h"
 
 GLOBAL struct {
     struct atomic_i32 game_thread_shutdown;
@@ -64,12 +65,14 @@ INTERNAL void reset_world(void);
 struct game_startup_receipt game_startup(struct mixer_startup_receipt *mixer_sr,
                                          struct sprite_startup_receipt *sheet_sr,
                                          struct sound_startup_receipt *sound_sr,
-                                         struct phys_startup_receipt *phys_sr)
+                                         struct phys_startup_receipt *phys_sr,
+                                         struct sock_startup_receipt *sock_sr)
 {
     (UNUSED)mixer_sr;
     (UNUSED)sheet_sr;
     (UNUSED)sound_sr;
     (UNUSED)phys_sr;
+    (UNUSED)sock_sr;
 
     /* Initialize game input storage */
     G.game_input_mutex = sys_mutex_alloc();
@@ -459,6 +462,50 @@ INTERNAL void game_update(struct game_cmd_list game_cmds)
     __prof;
 
     struct temp_arena scratch = scratch_begin_no_conflict();
+
+
+
+
+
+
+
+
+
+
+    {
+        static struct sock sock = ZI;
+        if (!sock.handle) {
+            struct sock_address bind_addr = ZI;
+            bind_addr.ip = SOCK_IP_ANY_INTERFACE;
+            bind_addr.port = 12345;
+            sock = sock_alloc(bind_addr, SOCK_FLAG_NON_BLOCKING_RECV);
+        }
+    }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
 
     /* ========================== *
      * Reset level if necessary

src/game.h

@@ -6,6 +6,7 @@ struct mixer_startup_receipt;
 struct sprite_startup_receipt;
 struct sound_startup_receipt;
 struct phys_startup_receipt;
+struct sock_startup_receipt;
 
 /* Absolute layers */
 #define GAME_LAYER_FLOOR_DECALS         -300
@@ -21,7 +22,8 @@ struct game_startup_receipt { i32 _; };
 struct game_startup_receipt game_startup(struct mixer_startup_receipt *mixer_sr,
                                          struct sprite_startup_receipt *sheet_sr,
                                          struct sound_startup_receipt *sound_sr,
-                                         struct phys_startup_receipt *phys_sr);
+                                         struct phys_startup_receipt *phys_sr,
+                                         struct sock_startup_receipt *sock_sr);
 
 
 /* ========================== *

src/sock.h

@@ -0,0 +1,62 @@
+#ifndef SOCK_H
+#define SOCK_H
+
+#define SOCK_IP_ANY_INTERFACE CPPCOMPAT_INITLIST_TYPE(struct sock_ip) { 0 }
+#define SOCK_PORT_DYNAMIC (0)
+
+struct sock_ip {
+    u8 b[16];
+};
+
+struct sock_address {
+    struct sock_ip ip;
+    u32 port;
+};
+
+struct sock {
+    u64 handle;
+};
+
+enum sock_flag {
+    SOCK_FLAG_NONE                  = (1 << 0),
+    SOCK_FLAG_NON_BLOCKING_RECV     = (1 << 1)
+};
+
+/* ========================== *
+ * Startup
+ * ========================== */
+
+struct sock_startup_receipt { i32 _; };
+struct sock_startup_receipt sock_startup(void);
+
+/* ========================== *
+ * Address
+ * ========================== */
+
+b32 sock_ip_is_ipv4(struct sock_ip ip);
+b32 sock_string_is_ipv4(struct string s);
+struct sock_ip sock_ip_from_string(struct string s);
+struct string sock_ip_to_string(struct arena *arena, struct sock_ip addr);
+
+
+/* ========================== *
+ * Sock
+ * ========================== */
+
+struct sock sock_alloc(struct sock_address addr, sock_receive_callback_func *receive_callback, u64 flags);
+void sock_release(struct sock *sock);
+void sock_write(struct sock *sock, struct sock_address address, struct string msg);
+
+
+
+
+
+
+
+
+
+void sock_testsend(void);
+
+void sock_testrecv(void);
+
+#endif

src/sock_win32.c

@@ -0,0 +1,494 @@
+#include "sock.h"
+#include "sys.h"
+#include "log.h"
+#include "arena.h"
+#include "scratch.h"
+
+#include <WinSock2.h>
+#include <WS2tcpip.h>
+
+#pragma comment(lib, "ws2_32.lib")
+
+#define MAX_IP_STR_LEN 46
+
+INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(win32_sock_receive_entry_point, arg);
+
+struct win32_sock {
+    SOCKET socket;
+    struct sockaddr_in6 sa6;
+
+    sock_receive_callback_func *receive_callback;
+    struct sys_thread receive_thread;
+
+    struct win32_sock *next_free;
+};
+
+/* ========================== *
+ * Global state
+ * ========================== */
+
+GLOBAL struct {
+    struct sys_mutex win32_socks_mutex;
+    struct arena win32_socks_arena;
+    struct win32_sock *first_free_win32_sock;
+
+    WSADATA wsa_data;
+} G = ZI, DEBUG_ALIAS(G, G_sock_win32);
+
+/* ========================== *
+ * Startup
+ * ========================== */
+
+struct sock_startup_receipt sock_startup(void)
+{
+    G.win32_socks_mutex = sys_mutex_alloc();
+    G.win32_socks_arena = arena_alloc(GIGABYTE(64));
+
+    /* Initialize Winsock */
+    WSAStartup(MAKEWORD(2, 2), &G.wsa_data);
+    //WSACleanup();
+
+    return (struct sock_startup_receipt) { 0 };
+}
+
+/* ========================== *
+ * Address
+ * ========================== */
+
+#if 1
+
+INTERNAL struct sockaddr_in6 win32_sa6_from_sock_address(struct sock_address sa)
+{
+    struct sockaddr_in6 res = ZI;
+    res.sin6_family = AF_INET6;
+    res.sin6_port = htons(sa.port);
+    CT_ASSERT(sizeof(res.sin6_addr.s6_addr) == 16);
+    CT_ASSERT(sizeof(sa.ip) == 16);
+
+    b32 is_any = true;
+    for (u64 i = 0; i < 16; ++i) {
+        u8 b = sa.ip.b[i];
+        res.sin6_addr.s6_addr[i] = b;
+        is_any = (is_any && b == 0);
+    }
+    if (is_any) {
+        res.sin6_addr = in6addr_any;
+    }
+
+    return res;
+}
+
+INTERNAL struct sock_address sock_address_from_win32_sa6(struct sockaddr_in6 sa6)
+{
+    struct sock_address res = ZI;
+    CT_ASSERT(sizeof(sa6.sin6_addr.s6_addr) == 16);
+    CT_ASSERT(sizeof(res.ip) == 16);
+    MEMCPY(res.ip.b, sa6.sin6_addr.s6_addr, 16);
+    res.port = ntohs(sa6.sin6_port);
+    return res;
+}
+
+b32 sock_ip_is_ipv4(struct sock_ip ip)
+{
+    return ((ip.b[0] == 0x00) &&
+            (ip.b[1] == 0x00) &&
+            (ip.b[2] == 0x00) &&
+            (ip.b[3] == 0x00) &&
+            (ip.b[4] == 0x00) &&
+            (ip.b[5] == 0x00) &&
+            (ip.b[6] == 0x00) &&
+            (ip.b[7] == 0x00) &&
+            (ip.b[8] == 0x00) &&
+            (ip.b[9] == 0x00) &&
+            (ip.b[10] == 0xFF) &&
+            (ip.b[11] == 0xFF));
+}
+
+b32 sock_string_is_ipv4(struct string s)
+{
+    b32 ipv4 = true;
+    for (u64 i = 0; i < s.len; ++i) {
+        u8 c = s.text[i];
+        if (c == '.') {
+            ipv4 = true;
+            break;
+        } else if (c == ':') {
+            ipv4 = false;
+            break;
+        }
+    }
+    return ipv4;
+}
+
+struct sock_ip sock_ip_from_string(struct string s)
+{
+    struct temp_arena scratch = scratch_begin_no_conflict();
+    char *cstr = cstr_from_string(scratch.arena, s);
+
+    u8 buff[16] = ZI;
+    if (sock_string_is_ipv4(s)) {
+        buff[10] = 0xFF;
+        buff[11] = 0xFF;
+        inet_pton(AF_INET, cstr, buff + 12);
+    } else {
+        inet_pton(AF_INET6, cstr, buff);
+    }
+
+    struct sock_ip res = ZI;
+    CT_ASSERT(sizeof(res.b) == sizeof(buff));
+    MEMCPY(res.b, buff, sizeof(buff));
+
+    scratch_end(scratch);
+
+    return res;
+}
+
+struct string sock_ip_to_string(struct arena *arena, struct sock_ip ip)
+{
+    char buff[MAX_IP_STR_LEN];
+    if (sock_ip_is_ipv4(ip)) {
+        inet_ntop(AF_INET, ip.b + 12, buff, sizeof(buff));
+    } else {
+        inet_ntop(AF_INET6, ip.b, buff, sizeof(buff));
+    }
+    struct string res = string_copy(arena, string_from_cstr_limit(buff, sizeof(buff)));
+    return res;
+}
+
+#else
+
+INTERNAL struct sockaddr_in6 win32_sa6_from_sock_address(struct sock_address sa)
+{
+    struct sockaddr_in6 res = ZI;
+    res.sin6_family = AF_INET6;
+    res.sin6_port = htons(sa.port);
+    if (u128_eq(sa.ip, SOCK_IP_ANY_INTERFACE)) {
+        res.sin6_addr = in6addr_any;
+    } else {
+        /* TODO: store address structure in network byte order by default */
+        u64 hi = U128_HI(sa.ip);
+        u64 lo = U128_LO(sa.ip);
+        u8 *dst = res.sin6_addr.s6_addr;
+        dst[0] = (hi >> 56) & 0xFF;
+        dst[1] = (hi >> 48) & 0xFF;
+        dst[2] = (hi >> 40) & 0xFF;
+        dst[3] = (hi >> 32) & 0xFF;
+        dst[4] = (hi >> 24) & 0xFF;
+        dst[5] = (hi >> 16) & 0xFF;
+        dst[6] = (hi >> 8) & 0xFF;
+        dst[7] = (hi >> 0) & 0xFF;
+        dst[8] =  (lo >> 56) & 0xFF;
+        dst[9] =  (lo >> 48) & 0xFF;
+        dst[10] = (lo >> 40) & 0xFF;
+        dst[11] = (lo >> 32) & 0xFF;
+        dst[12] = (lo >> 24) & 0xFF;
+        dst[13] = (lo >> 16) & 0xFF;
+        dst[14] = (lo >> 8) & 0xFF;
+        dst[15] = (lo >> 0) & 0xFF;
+    }
+    res.sin6_port = htons(12345);
+    return res;
+}
+
+INTERNAL struct sock_address sock_address_from_win32_sa6(struct sockaddr_in6 sa6)
+{
+    struct sock_address res = ZI;
+    u8 *src = sa6.sin6_addr.s6_addr;
+    /* TODO: store address structure in network byte order by default */
+    u64 hi = ((u64)src[0] << 56) |
+             ((u64)src[1] << 48) |
+             ((u64)src[2] << 40) |
+             ((u64)src[3] << 32) |
+             ((u64)src[4] << 24) |
+             ((u64)src[5] << 16) |
+             ((u64)src[6] << 8) |
+             ((u64)src[7] << 0);
+    u64 lo = ((u64)src[8] << 56) |
+             ((u64)src[9] << 48) |
+             ((u64)src[10] << 40) |
+             ((u64)src[11] << 32) |
+             ((u64)src[12] << 24) |
+             ((u64)src[13] << 16) |
+             ((u64)src[14] << 8) |
+             ((u64)src[15] << 0);
+    res.ip = U128(hi, lo);
+    res.port = ntohs(sa6.sin6_port);
+    return res;
+}
+
+struct sock_address sock_address_from_string(struct string s)
+{
+    u64 hi = 0;
+    u64 lo = 0;
+
+    b32 ipv4 = true;
+    for (u64 i = 0; i < s.len; ++i) {
+        u8 c = s.text[i];
+        if (c == '.') {
+            ipv4 = true;
+            break;
+        } else if (c == ':') {
+            ipv4 = false;
+            break;
+        }
+    }
+
+    if (ipv4) {
+        struct string seq = ZI;
+        seq.text = s.text;
+
+        u8 byte_index = 0;
+        u8 byte = 0;
+        u8 factor = 100;
+        for (u32 s_index = 0; s_index < s.len; ++s_index) {
+            u8 c = s.text[s_index];
+            if (c == '.' || s_index == (s.len - 1)) {
+                if (byte_index < 8) {
+                    lo |= (byte << (byte_index * 8));
+                } else {
+                    hi |= (byte << (byte_index * 8));
+                }
+
+                byte = 0;
+                factor = 100;
+                ++byte_index;
+            } else {
+                byte += ((c + 48) * factor);
+                factor *= 0.1;
+            }
+        }
+    } else {
+        /* TODO */
+        ASSERT(false);
+    }
+
+    return U128(hi, lo);
+}
+#endif
+
+/* ========================== *
+ * Sock
+ * ========================== */
+
+INTERNAL struct win32_sock *win32_sock_alloc(void)
+{
+    struct win32_sock *ws = NULL;
+    {
+        struct sys_lock lock = sys_mutex_lock_e(&G.win32_socks_mutex);
+        if (G.first_free_win32_sock) {
+            ws = G.first_free_win32_sock;
+            G.first_free_win32_sock = ws->next_free;
+        } else {
+            ws = arena_push(&G.win32_socks_arena, struct win32_sock);
+        }
+        sys_mutex_unlock(&lock);
+    }
+    MEMZERO_STRUCT(ws);
+    return ws;
+}
+
+INTERNAL void win32_sock_release(struct win32_sock *ws)
+{
+    struct sys_lock lock = sys_mutex_lock_e(&G.win32_socks_mutex);
+    ws->next_free = G.first_free_win32_sock;
+    G.first_free_win32_sock = ws;
+    sys_mutex_unlock(&lock);
+}
+
+struct sock sock_alloc(struct sock_address bind_addr, u64 flags)
+{
+    struct win32_sock *ws = win32_sock_alloc();
+
+    struct sockaddr_in6 sa6 = win32_sa6_from_sock_address(bind_addr);
+
+    ws->socket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+    if (bind_addr.) {
+        /* TODO: Error checking */
+        bind(ws->socket, (struct sockaddr *)&ws->sa6, sizeof(ws->sa6));
+    }
+
+    if (receive_callback) {
+        /* Spin up receive thread */
+        ws->receive_thread = sys_thread_alloc(win32_sock_receive_entry_point, ws, LIT("[P8] Sock receive thread"));
+    }
+
+    struct sock res = ZI;
+    res.handle = (u64)ws;
+    return res;
+}
+
+void sock_release(struct sock *sock)
+{
+    /* TODO */
+
+    struct win32_sock *ws = (struct win32_sock *)sock->handle;
+
+    //ws->shutdown_receiver
+
+    //closesocket(ws->socket);
+
+    win32_sock_release(ws);
+
+}
+
+struct sock_packet {
+    struct sock_address addr;
+    struct string msg;
+};
+
+void sock_send(struct sock *sock, struct sock_packet p)
+{
+    struct win32_sock *ws = (struct win32_sock *)sock->handle;
+    struct sockaddr_in6 sa6 = win32_sa6_from_sock_address(p.addr);
+    sendto(ws->socket, (char *)p.msg.text, p.msg.len, 0, (struct sockaddr *)&sa6, sizeof(sa6));
+}
+
+struct sock_packet sock_recv(struct sock *sock, u8 *buffer, u64 buffer_size)
+{
+    struct sock_packet p = ZI;
+    struct win32_sock *ws = (struct win32_sock *)sock->handle;
+
+
+
+
+    return p;
+}
+
+/* ========================== *
+ * Receive thread
+ * ========================== */
+
+INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(win32_sock_receive_entry_point, arg)
+{
+    struct win32_sock *ws = (struct win32_sock *)arg;
+    struct temp_arena scratch = scratch_begin_no_conflict();
+    u64 buffer_size = KILOBYTE(64);
+    u8 *buffer = arena_push_array(scratch.arena, u8, buffer_size);
+
+    struct sockaddr_in6 client_sa6 = ZI;
+    i32 client_sa6_size = sizeof(client_sa6);
+
+
+
+
+
+
+
+
+    struct sock_address dummy = ZI;
+    dummy.ip = sock_ip_from_string(LIT("127.0.0.1"));
+    dummy.port = 12345;
+    struct sockaddr_in6 dummy_sa6 = win32_sa6_from_sock_address(dummy);
+
+    char dummy_msg = 0;
+    sendto(ws->socket, &dummy_msg, 1, 0, (struct sockaddr *)&dummy_sa6, sizeof(dummy_sa6));
+
+
+
+
+
+
+    /* TODO: Allow thread shutdown */
+    volatile b32 shutdown = false;
+    while (!shutdown) {
+        i32 msg_len = recvfrom(ws->socket, (char *)buffer, buffer_size, 0, (struct sockaddr *)&client_sa6, &client_sa6_size);
+        if (msg_len == SOCKET_ERROR) {
+            i32 err = WSAGetLastError();
+            (UNUSED)err;
+            ASSERT(false);
+        } else if (msg_len > 0) {
+            if (ws->receive_callback) {
+                struct sock_address address = sock_address_from_win32_sa6(client_sa6);
+                ws->receive_callback(address, STRING(msg_len, buffer));
+            }
+        }
+    }
+
+    scratch_end(scratch);
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/* ========================== *
+ * Test
+ * ========================== */
+
+void sock_testsend(void)
+{
+    SOCKET sock;
+    struct sockaddr_in serverAddr;
+    char *message = "Hello, UDP!";
+
+    /* Create socket */
+    sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+    /* Set up the server address struct */
+    serverAddr.sin_family = AF_INET;
+    serverAddr.sin_port = htons(12345); /* Port */
+    // serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    if (inet_pton(AF_INET, "127.0.0.1", &serverAddr.sin_addr) <= 0) {
+        sys_panic(LIT("Invalid address"));
+    }
+
+    /* Send a message */
+    sendto(sock, message, strlen(message), 0, (struct sockaddr *)&serverAddr, sizeof(serverAddr));
+
+    /* Clean up */
+    closesocket(sock);
+    WSACleanup();
+}
+
+void sock_testrecv(void)
+{
+    SOCKET sock;
+    char clientIP[INET_ADDRSTRLEN];
+    struct sockaddr_in serverAddr, clientAddr;
+    char buffer[1024];
+    int clientAddrLen = sizeof(clientAddr);
+
+    /* Create socket */
+    sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+    /* Set up the server address struct */
+    serverAddr.sin_family = AF_INET;
+    serverAddr.sin_port = htons(12345); /* Port */
+    serverAddr.sin_addr.s_addr = INADDR_ANY; /* Accept any incoming address */
+
+    /* Bind the socket to the address */
+    bind(sock, (struct sockaddr *)&serverAddr, sizeof(serverAddr));
+
+    /* Receive a message */
+    volatile b32 run = true;
+    while (run) {
+        int recvLen = recvfrom(sock, buffer, sizeof(buffer), 0, (struct sockaddr *)&clientAddr, &clientAddrLen);
+        if (recvLen > 0) {
+            buffer[recvLen] = '\0';  /* Null-terminate the received message */
+
+            inet_ntop(AF_INET, &clientAddr.sin_addr, clientIP, sizeof(clientIP));
+
+            struct string addr = string_from_cstr(clientIP);
+            struct string msg = STRING((u64)recvLen, (u8 *)buffer);
+            i32 port = ntohs(clientAddr.sin_port);
+
+            logf_info("Received from %F:%F - %F\n", FMT_STR(addr), FMT_SINT(port), FMT_STR(msg));
+        }
+    }
+
+    // Clean up
+    closesocket(sock);
+    WSACleanup();
+}

src/sound.c

@@ -86,7 +86,7 @@ INTERNAL WORK_TASK_FUNC_DEF(sound_load_asset_task, vparams)
     __prof;
     struct sound_task_params *params = (struct sound_task_params *)vparams;
     struct temp_arena scratch = scratch_begin_no_conflict();
-    struct string path = string_from_cstr_len(params->path_cstr, params->path_len);
+    struct string path = STRING(params->path_len, (u8 *)params->path_cstr);
     struct asset *asset = params->asset;
     u32 flags = params->flags;
 

src/sprite.c

@@ -782,7 +782,7 @@ INTERNAL struct cache_node *node_lookup_touch(struct sprite_scope *scope, struct
     struct cache_node **nonmatching_next = NULL;
 
     struct cache_node_hash hash = cache_node_hash_from_tag_hash(tag.hash, kind);
-    u64 cache_bucket_index = U128_LO64(hash.v) % CACHE_BUCKETS_COUNT;
+    u64 cache_bucket_index = U128_LO(hash.v) % CACHE_BUCKETS_COUNT;
     struct cache_bucket *bucket = &G.cache.buckets[cache_bucket_index];
 
     /* Lookup */
@@ -1076,7 +1076,7 @@ INTERNAL SYS_THREAD_ENTRY_POINT_FUNC_DEF(sprite_evictor_thread_entry_point, arg)
 #if RESOURCE_RELOADING
                                 /* Check if file changed for resource reloading */
                                 if (!consider_for_eviction) {
-                                    struct string path = string_from_cstr_len((char *)n->tag_path, n->tag_path_len);
+                                    struct string path = STRING(n->tag_path_len, n->tag_path);
                                     b32 file_changed = false;
                                     struct sys_datetime current_file_time;
                                     {

src/string.c

@@ -658,6 +658,21 @@ u64 cstr_len(char *cstr)
     return end - cstr;
 }
 
+u64 cstr_len_limit(char *cstr, u64 limit)
+{
+    char *end = cstr;
+    if (cstr) {
+        for (u64 i = 0; i < limit; ++i) {
+            if (*end) {
+                ++end;
+            } else {
+                break;
+            }
+        }
+    }
+    return end - cstr;
+}
+
 char *cstr_from_string(struct arena *arena, struct string src)
 {
     u8 *text = arena_push_array(arena, u8, src.len + 1);
@@ -685,8 +700,9 @@ struct string string_from_cstr(char *cstr)
     };
 }
 
-struct string string_from_cstr_len(char *cstr, u64 len)
+struct string string_from_cstr_limit(char *cstr, u64 limit)
 {
+    u64 len = cstr_len_limit(cstr, limit);
     return (struct string) {
         .text = (u8 *)cstr,
         .len = len

src/string.h

@@ -111,10 +111,11 @@ struct string32 string32_from_string(struct arena *arena, struct string str8);
  * ========================== */
 
 u64 cstr_len(char *cstr);
+u64 cstr_len_limit(char *cstr, u64 limit);
 char *cstr_from_string(struct arena *arena, struct string src);
 char *cstr_buff_from_string(struct string dest_buff, struct string src);
 struct string string_from_cstr(char *cstr);
-struct string string_from_cstr_len(char *cstr, u64 len);
+struct string string_from_cstr_limit(char *cstr, u64 limit);
 
 u64 wstr_len(wchar_t *wstr);
 wchar_t *wstr_from_string(struct arena *arena, struct string src);

src/sys_win32.c

@@ -1620,12 +1620,11 @@ struct thread_local_store *sys_thread_get_thread_local_store(void)
  * Threads
  * ========================== */
 
-INTERNAL struct win32_thread *win32_thread_alloc_locked(struct sys_lock *lock)
+INTERNAL struct win32_thread *win32_thread_alloc(void)
 {
-    sys_assert_locked_e(lock, &G.threads_mutex);
-    (UNUSED)lock;
-
     struct win32_thread *t = NULL;
+    struct sys_lock lock = sys_mutex_lock_e(&G.threads_mutex);
+    {
         if (G.threads_first_free) {
             t = G.threads_first_free;
             G.threads_first_free = t->next;
@@ -1640,14 +1639,15 @@ INTERNAL struct win32_thread *win32_thread_alloc_locked(struct sys_lock *lock)
         }
         t->prev = G.threads_last;
         G.threads_last = t;
+    }
+    sys_mutex_unlock(&lock);
     return t;
 }
 
-INTERNAL void win32_thread_release_locked(struct sys_lock *lock, struct win32_thread *t)
+INTERNAL void win32_thread_release(struct win32_thread *t)
+{
+    struct sys_lock lock = sys_mutex_lock_e(&G.threads_mutex);
     {
-    sys_assert_locked_e(lock, &G.threads_mutex);
-    (UNUSED)lock;
-
         if (t->prev) {
             t->prev->next = t->next;
         }
@@ -1660,9 +1660,9 @@ INTERNAL void win32_thread_release_locked(struct sys_lock *lock, struct win32_th
         if (G.threads_last == t) {
             G.threads_last = t->prev;
         }
-    *t = (struct win32_thread) {
+        t->next = G.threads_first_free;
-        .next = G.threads_first_free
+    }
-    };
+    sys_mutex_unlock(&lock);
 }
 
 INTERNAL DWORD WINAPI win32_thread_proc(LPVOID vt)
@@ -1680,6 +1680,7 @@ INTERNAL DWORD WINAPI win32_thread_proc(LPVOID vt)
     /* Set thread name */
     struct string thread_name = string_from_cstr(t->thread_name_cstr);
     if (thread_name.len > 0) {
+        /* FIXME: Don't use scratch arena here, to avoid scratch TLS being initialized for threads that don't need them otherwise */
         struct temp_arena scratch = scratch_begin_no_conflict();
         wchar_t *wc_thread_name = wstr_from_string(scratch.arena, thread_name);
         SetThreadDescription(GetCurrentThread(), wc_thread_name);
@@ -1688,16 +1689,9 @@ INTERNAL DWORD WINAPI win32_thread_proc(LPVOID vt)
 
     logf_info("New thread \"%F\" created with ID %F", FMT_STR(thread_name), FMT_UINT(sys_thread_id()));
 
-    /* Start thread */
+    /* Enter thread entry point */
     t->entry_point(t->thread_data);
 
-    /* Release thread object */
-    struct sys_lock lock = sys_mutex_lock_e(&G.threads_mutex);
-    {
-        win32_thread_release_locked(&lock, t);
-    }
-    sys_mutex_unlock(&lock);
-
     /* Release TLS */
     win32_tls_release(&tls);
 
@@ -1713,10 +1707,9 @@ struct sys_thread sys_thread_alloc(sys_thread_entry_point_func *entry_point, voi
     logf_info("Creating thread \"%F\"", FMT_STR(thread_name));
 
     struct sys_thread res = ZI;
-    struct sys_lock lock = sys_mutex_lock_e(&G.threads_mutex);
+
-    {
     /* Allocate thread object */
-        struct win32_thread *t = win32_thread_alloc_locked(&lock);
+    struct win32_thread *t = win32_thread_alloc();
     t->entry_point = entry_point;
     t->thread_data = thread_data;
 
@@ -1737,27 +1730,15 @@ struct sys_thread sys_thread_alloc(sys_thread_entry_point_func *entry_point, voi
     }
 
     res.handle = (u64)t;
-    }
-    sys_mutex_unlock(&lock);
-
     return res;
 }
 
 void sys_thread_wait_release(struct sys_thread *thread)
-{
-    HANDLE handle = 0;
-
-    /* Lookup */
-    struct sys_lock lock = sys_mutex_lock_s(&G.threads_mutex);
 {
     struct win32_thread *t = (struct win32_thread *)thread->handle;
-        if (t) {
+    HANDLE handle = t->handle;
-            handle = t->handle;
-        }
-    }
-    sys_mutex_unlock(&lock);
 
-    /* Wait */
+    /* Wait for thread to stop */
     if (handle) {
         DWORD res = WaitForSingleObject(handle, INFINITE);
         CloseHandle(handle);
@@ -1765,6 +1746,9 @@ void sys_thread_wait_release(struct sys_thread *thread)
         ASSERT(res != WAIT_FAILED);
         (UNUSED)res;
     }
+
+    /* Release thread struct */
+    win32_thread_release(t);
 }
 
 u32 sys_thread_id(void)

src/user.c

@@ -19,6 +19,7 @@
 #include "collider.h"
 #include "rng.h"
 #include "log.h"
+#include "sock.h"
 
 struct bind_state {
     b32 is_held;                    /* Is this bind held down this frame */
@@ -136,6 +137,7 @@ struct user_startup_receipt user_startup(struct work_startup_receipt *work_sr,
                                          struct game_startup_receipt *game_sr,
                                          struct asset_cache_startup_receipt *asset_cache_sr,
                                          struct mixer_startup_receipt *mixer_sr,
+                                         struct sock_startup_receipt *sock_sr,
                                          struct sys_window *window)
 {
     (UNUSED)work_sr;
@@ -146,6 +148,7 @@ struct user_startup_receipt user_startup(struct work_startup_receipt *work_sr,
     (UNUSED)game_sr;
     (UNUSED)asset_cache_sr;
     (UNUSED)mixer_sr;
+    (UNUSED)sock_sr;
 
     G.arena = arena_alloc(GIGABYTE(64));
     G.sys_events_mutex = sys_mutex_alloc();
@@ -468,6 +471,40 @@ INTERNAL void user_update(void)
 {
     struct temp_arena scratch = scratch_begin_no_conflict();
 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    {
+        static struct sock sock = ZI;
+        if (!sock.handle) {
+            struct sock_address bind_addr = ZI;
+            bind_addr.ip = SOCK_IP_ANY_INTERFACE;
+            bind_addr.port = SOCK_PORT_DYNAMIC;  /* Dynamic port */
+            sock = sock_alloc(bind_addr, SOCK_FLAG_NON_BLOCKING_RECV);
+        }
+    }
+
+
+
+
+
+
+
+
+
+
+
     /* ========================== *
      * Begin frame
      * ========================== */

src/user.h

@@ -10,6 +10,7 @@ struct draw_startup_receipt;
 struct game_startup_receipt;
 struct asset_cache_startup_receipt;
 struct mixer_startup_receipt;
+struct sock_startup_receipt;
 
 enum user_bind_kind {
     USER_BIND_KIND_NONE,
@@ -56,6 +57,7 @@ struct user_startup_receipt user_startup(struct work_startup_receipt *work_sr,
                                          struct game_startup_receipt *game_sr,
                                          struct asset_cache_startup_receipt *asset_cache_sr,
                                          struct mixer_startup_receipt *mixer_sr,
+                                         struct sock_startup_receipt *sock_sr,
                                          struct sys_window *window);
 
 #endif