303 lines
8.1 KiB
C
303 lines
8.1 KiB
C
// shellApp.c — DVX Shell application loading, lifecycle, and reaping
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//
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// Manages DXE app loading via dlopen/dlsym, resource tracking through
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// sCurrentAppId, and clean teardown of both callback-only and main-loop apps.
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#include "shellApp.h"
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#include "dvxDialog.h"
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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// ============================================================
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// Module state
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// ============================================================
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static ShellAppT sApps[SHELL_MAX_APPS];
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int32_t sCurrentAppId = 0;
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// ============================================================
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// Prototypes
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// ============================================================
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static int32_t allocSlot(void);
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static void appTaskWrapper(void *arg);
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static const char *baseName(const char *path);
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void shellAppInit(void);
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void shellForceKillApp(AppContextT *ctx, ShellAppT *app);
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ShellAppT *shellGetApp(int32_t appId);
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int32_t shellLoadApp(AppContextT *ctx, const char *path);
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void shellReapApp(AppContextT *ctx, ShellAppT *app);
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bool shellReapApps(AppContextT *ctx);
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int32_t shellRunningAppCount(void);
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void shellTerminateAllApps(AppContextT *ctx);
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// ============================================================
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// Static helpers
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// ============================================================
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static int32_t allocSlot(void) {
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (sApps[i].state == AppStateFreeE) {
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return i;
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}
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}
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return -1;
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}
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static void appTaskWrapper(void *arg) {
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ShellAppT *app = (ShellAppT *)arg;
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sCurrentAppId = app->appId;
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app->entryFn(&app->dxeCtx);
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sCurrentAppId = 0;
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// App returned from its main loop — mark for reaping
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app->state = AppStateTerminatingE;
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}
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static const char *baseName(const char *path) {
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const char *slash = strrchr(path, '/');
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if (!slash) {
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slash = strrchr(path, '\\');
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}
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return slash ? slash + 1 : path;
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}
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// ============================================================
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// Public API (alphabetical)
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// ============================================================
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void shellAppInit(void) {
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memset(sApps, 0, sizeof(sApps));
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}
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void shellForceKillApp(AppContextT *ctx, ShellAppT *app) {
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if (!app || app->state == AppStateFreeE) {
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return;
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}
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// Destroy all windows belonging to this app
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for (int32_t i = ctx->stack.count - 1; i >= 0; i--) {
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if (ctx->stack.windows[i]->appId == app->appId) {
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dvxDestroyWindow(ctx, ctx->stack.windows[i]);
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}
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}
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// Kill the task if it has one
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if (app->hasMainLoop && app->mainTaskId > 0) {
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if (tsGetState(app->mainTaskId) != TaskStateTerminated) {
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tsKill(app->mainTaskId);
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}
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}
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// Close the DXE
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if (app->dxeHandle) {
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dlclose(app->dxeHandle);
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app->dxeHandle = NULL;
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}
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app->state = AppStateFreeE;
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shellLog("Shell: force-killed app '%s'", app->name);
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}
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ShellAppT *shellGetApp(int32_t appId) {
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if (appId < 1 || appId >= SHELL_MAX_APPS) {
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return NULL;
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}
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if (sApps[appId].state == AppStateFreeE) {
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return NULL;
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}
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return &sApps[appId];
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}
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int32_t shellLoadApp(AppContextT *ctx, const char *path) {
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// Allocate a slot
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int32_t id = allocSlot();
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if (id < 0) {
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dvxMessageBox(ctx, "Error", "Maximum number of applications reached.", MB_OK | MB_ICONERROR);
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return -1;
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}
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// Load the DXE
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void *handle = dlopen(path, RTLD_GLOBAL);
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if (!handle) {
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char msg[512];
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snprintf(msg, sizeof(msg), "Failed to load %s:\n%s", baseName(path), dlerror());
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dvxMessageBox(ctx, "Error", msg, MB_OK | MB_ICONERROR);
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return -1;
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}
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// Look up required symbols
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AppDescriptorT *desc = (AppDescriptorT *)dlsym(handle, "_appDescriptor");
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if (!desc) {
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char msg[256];
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snprintf(msg, sizeof(msg), "%s: missing appDescriptor", baseName(path));
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dvxMessageBox(ctx, "Error", msg, MB_OK | MB_ICONERROR);
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dlclose(handle);
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return -1;
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}
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int32_t (*entry)(DxeAppContextT *) = (int32_t (*)(DxeAppContextT *))dlsym(handle, "_appMain");
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if (!entry) {
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char msg[256];
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snprintf(msg, sizeof(msg), "%s: missing appMain", baseName(path));
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dvxMessageBox(ctx, "Error", msg, MB_OK | MB_ICONERROR);
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dlclose(handle);
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return -1;
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}
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void (*shutdown)(void) = (void (*)(void))dlsym(handle, "_appShutdown");
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// Fill in the app slot
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ShellAppT *app = &sApps[id];
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memset(app, 0, sizeof(*app));
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app->appId = id;
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snprintf(app->name, SHELL_APP_NAME_MAX, "%s", desc->name);
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snprintf(app->path, sizeof(app->path), "%s", path);
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app->dxeHandle = handle;
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app->hasMainLoop = desc->hasMainLoop;
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app->entryFn = entry;
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app->shutdownFn = shutdown;
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app->state = AppStateLoadedE;
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// Set up the context passed to appMain
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app->dxeCtx.shellCtx = ctx;
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app->dxeCtx.appId = id;
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// Derive app directory from path (everything up to last '/' or '\')
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snprintf(app->dxeCtx.appDir, sizeof(app->dxeCtx.appDir), "%s", path);
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char *lastSlash = strrchr(app->dxeCtx.appDir, '/');
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char *lastBack = strrchr(app->dxeCtx.appDir, '\\');
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if (lastBack > lastSlash) {
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lastSlash = lastBack;
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}
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if (lastSlash) {
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*lastSlash = '\0';
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} else {
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app->dxeCtx.appDir[0] = '.';
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app->dxeCtx.appDir[1] = '\0';
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}
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// Launch
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sCurrentAppId = id;
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if (desc->hasMainLoop) {
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uint32_t stackSize = desc->stackSize > 0 ? (uint32_t)desc->stackSize : TS_DEFAULT_STACK_SIZE;
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int32_t priority = desc->priority;
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int32_t taskId = tsCreate(desc->name, appTaskWrapper, app, stackSize, priority);
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if (taskId < 0) {
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sCurrentAppId = 0;
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dvxMessageBox(ctx, "Error", "Failed to create task for application.", MB_OK | MB_ICONERROR);
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dlclose(handle);
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app->state = AppStateFreeE;
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return -1;
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}
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app->mainTaskId = (uint32_t)taskId;
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} else {
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// Callback-only: call entry directly in task 0
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app->entryFn(&app->dxeCtx);
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}
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sCurrentAppId = 0;
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app->state = AppStateRunningE;
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shellLog("Shell: loaded '%s' (id=%ld, mainLoop=%s, entry=0x%08lx, desc=0x%08lx)", app->name, (long)id, app->hasMainLoop ? "yes" : "no", (unsigned long)entry, (unsigned long)desc);
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return id;
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}
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void shellReapApp(AppContextT *ctx, ShellAppT *app) {
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if (!app || app->state == AppStateFreeE) {
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return;
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}
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// Call shutdown hook if present
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if (app->shutdownFn) {
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sCurrentAppId = app->appId;
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app->shutdownFn();
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sCurrentAppId = 0;
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}
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// Destroy all windows belonging to this app
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for (int32_t i = ctx->stack.count - 1; i >= 0; i--) {
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if (ctx->stack.windows[i]->appId == app->appId) {
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dvxDestroyWindow(ctx, ctx->stack.windows[i]);
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}
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}
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// Kill the task if it has one and it's still alive
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if (app->hasMainLoop && app->mainTaskId > 0) {
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if (tsGetState(app->mainTaskId) != TaskStateTerminated) {
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tsKill(app->mainTaskId);
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}
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}
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// Close the DXE
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if (app->dxeHandle) {
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dlclose(app->dxeHandle);
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app->dxeHandle = NULL;
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}
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shellLog("Shell: reaped app '%s'", app->name);
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app->state = AppStateFreeE;
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}
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bool shellReapApps(AppContextT *ctx) {
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bool reaped = false;
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (sApps[i].state == AppStateTerminatingE) {
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shellReapApp(ctx, &sApps[i]);
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reaped = true;
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}
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}
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return reaped;
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}
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int32_t shellRunningAppCount(void) {
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int32_t count = 0;
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (sApps[i].state == AppStateRunningE || sApps[i].state == AppStateLoadedE) {
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count++;
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}
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}
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return count;
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}
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void shellTerminateAllApps(AppContextT *ctx) {
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for (int32_t i = 1; i < SHELL_MAX_APPS; i++) {
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if (sApps[i].state != AppStateFreeE) {
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shellForceKillApp(ctx, &sApps[i]);
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}
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}
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}
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