Enhance thread management and build script

- Added check for thread worker in thread_master_init to provide informative error message.
- Updated main function to properly assign jobs to the thread worker.
- Modified build script to create a bin directory if it doesn't exist.

build.sh

@@ -1,5 +1,6 @@
 # This script builds the project
 mkdir -p build
+mkdir -p bin
 cd ./build
 cmake ..
 make

include/threadlib/threadlib.c

@@ -61,7 +61,15 @@ void *__thread_master_init__(void *params)
 
     printf("Thread Master - Success: Ready.\n");
 
-    thread_master_assign_new_job(param->__thread_worker__, param->custom_params);
+    if (param->__thread_worker__ == NULL)
+    {
+        fprintf(stderr, "Thread Master - Info: No task given, use \"thread_master_assign_new_job\" to run a task\n");
+    }
+    else
+    {
+        thread_master_assign_new_job(param->__thread_worker__, param->custom_params);
+    }
+
     return NULL;
 }
 
@@ -84,6 +92,7 @@ void thread_master_init(int max_threads, void *(*__thread_worker__)(void *), voi
         fprintf(stderr, "Thread Master - Error: Failed to create thread master.\n");
         exit(EXIT_FAILURE);
     }
+
     isThreadMasterRunning = 1;
 
     pthread_detach(thread_master);

src/main.c

@@ -21,6 +21,8 @@ void *thread_worker(void *params)
         return NULL;
     }
 
+    sleep_ms(100);
+
     custom->a += 10;
 
     printf("Thread %d - WE ARE RUNNING THIS TASK\n", param->thread_id);
@@ -33,9 +35,17 @@ int main(void)
 {
     custom_params_t *custom_params = (custom_params_t *)malloc(sizeof(custom_params_t));
     custom_params->a = 0;
-    thread_master_init(MAX_THREAD, thread_worker, NULL);
+    thread_master_init(MAX_THREAD, NULL, custom_params);
+
+    sleep_ms(1000);
+
+    thread_master_assign_new_job(thread_worker, custom_params);
+    thread_master_assign_new_job(thread_worker, custom_params);
+    thread_master_assign_new_job(thread_worker, custom_params);
 
     thread_master_free();
     printf("Custom Params: %d\n", custom_params->a);
+
+    free(custom_params);
     return 0;
 }