Core/ResourceLimits: Implemented the basic structure of ResourceLimits.

Implemented svcs GetResourceLimit, GetResourceLimitCurrentValues and GetResourceLimitLimitValues.

Note that the resource limits do not currently keep track of used objects, since we have no way to distinguish between an object created by the application, and an object created by some HLE module once we're inside Kernel::T::Create.

1 files changed, 119 insertions, 0 deletions

diff --git a/src/core/hle/kernel/resource_limit.h b/src/core/hle/kernel/resource_limit.h
new file mode 100644
index 00000000..201ec0db
--- /dev/null
+++ b/src/core/hle/kernel/resource_limit.h
@@ -0,0 +1,119 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+#include "core/hle/kernel/kernel.h"
+
+namespace Kernel {
+
+enum class ResourceLimitCategory : u8 {
+    APPLICATION = 0,
+    SYS_APPLET  = 1,
+    LIB_APPLET  = 2,
+    OTHER       = 3
+};
+
+enum ResourceTypes {
+    PRIORITY            = 0,
+    COMMIT              = 1,
+    THREAD              = 2,
+    EVENT               = 3,
+    MUTEX               = 4,
+    SEMAPHORE           = 5,
+    TIMER               = 6,
+    SHARED_MEMORY       = 7,
+    ADDRESS_ARBITER     = 8,
+    CPU_TIME            = 9,
+};
+
+class ResourceLimit final : public Object {
+public:
+    /**
+     * Creates a resource limit object.
+     */
+    static SharedPtr<ResourceLimit> Create(std::string name = "Unknown");
+
+    /**
+     * Retrieves the resource limit associated with the specified resource limit category.
+     * @param category The resource limit category
+     * @returns The resource limit associated with the category
+     */
+    static SharedPtr<ResourceLimit> GetForCategory(ResourceLimitCategory category);
+
+    std::string GetTypeName() const override { return "ResourceLimit"; }
+    std::string GetName() const override { return name; }
+
+    static const HandleType HANDLE_TYPE = HandleType::ResourceLimit;
+    HandleType GetHandleType() const override { return HANDLE_TYPE; }
+
+    /**
+     * Gets the current value for the specified resource.
+     * @param resource Requested resource type
+     * @returns The current value of the resource type
+     */
+    s32 GetCurrentResourceValue(u32 resource) const;
+
+    /**
+     * Gets the max value for the specified resource.
+     * @param resource Requested resource type
+     * @returns The max value of the resource type
+     */
+    s32 GetMaxResourceValue(u32 resource) const;
+
+    /// Name of resource limit object.
+    std::string name;
+
+    /// Max thread priority that a process in this category can create
+    s32 max_priority = 0;
+
+    /// Max memory that processes in this category can use
+    s32 max_commit = 0;
+
+    ///< Max number of objects that can be collectively created by the processes in this category
+    s32 max_threads = 0;
+    s32 max_events = 0;
+    s32 max_mutexes = 0;
+    s32 max_semaphores = 0;
+    s32 max_timers = 0;
+    s32 max_shared_mems = 0;
+    s32 max_address_arbiters = 0;
+    
+    /// Max CPU time that the processes in this category can utilize
+    s32 max_cpu_time = 0;
+
+    // TODO(Subv): Increment these in their respective Kernel::T::Create functions, keeping in mind that 
+    // APPLICATION resource limits should not be affected by the objects created by service modules. 
+    // Currently we have no way of distinguishing if a Create was called by the running application, 
+    // or by a service module. Approach this once we have separated the service modules into their own processes
+
+    /// Current memory that the processes in this category are using
+    s32 current_commit = 0;
+
+    ///< Current number of objects among all processes in this category
+    s32 current_threads = 0;
+    s32 current_events = 0;
+    s32 current_mutexes = 0;
+    s32 current_semaphores = 0;
+    s32 current_timers = 0;
+    s32 current_shared_mems = 0;
+    s32 current_address_arbiters = 0;
+
+    /// Current CPU time that the processes in this category are utilizing
+    s32 current_cpu_time = 0;
+
+private:
+    ResourceLimit();
+    ~ResourceLimit() override;
+};
+
+/// Initializes the resource limits
+void ResourceLimitsInit();
+
+// Destroys the resource limits
+void ResourceLimitsShutdown();
+
+} // namespace