6 files changed, 286 insertions, 1 deletions

diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp
index b5c98b249..726e4d2ff 100644
--- a/src/core/hle/kernel/kernel.cpp
+++ b/src/core/hle/kernel/kernel.cpp
@@ -10,6 +10,7 @@
 #include "core/arm/arm_interface.h"
 #include "core/core.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/timer.h"
@@ -134,6 +135,7 @@ void HandleTable::Clear() {
 
 /// Initialize the kernel
 void Init() {
+    Kernel::ResourceLimitsInit();
     Kernel::ThreadingInit();
     Kernel::TimersInit();
 
@@ -147,6 +149,7 @@ void Init() {
 void Shutdown() {
     Kernel::ThreadingShutdown();
     Kernel::TimersShutdown();
+    Kernel::ResourceLimitsShutdown();
     g_handle_table.Clear(); // Free all kernel objects
     g_current_process = nullptr;
 }
diff --git a/src/core/hle/kernel/kernel.h b/src/core/hle/kernel/kernel.h
index 7c106d37c..28748c8f5 100644
--- a/src/core/hle/kernel/kernel.h
+++ b/src/core/hle/kernel/kernel.h
@@ -46,7 +46,8 @@ enum class HandleType : u32 {
     Process         = 8,
     AddressArbiter  = 9,
     Semaphore       = 10,
-    Timer           = 11
+    Timer           = 11,
+    ResourceLimit   = 12,
 };
 
 enum {
diff --git a/src/core/hle/kernel/process.cpp b/src/core/hle/kernel/process.cpp
index 0cdfa58d7..b5c87e883 100644
--- a/src/core/hle/kernel/process.cpp
+++ b/src/core/hle/kernel/process.cpp
@@ -7,6 +7,7 @@
 #include "common/logging/log.h"
 
 #include "core/hle/kernel/process.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 #include "core/memory.h"
 
diff --git a/src/core/hle/kernel/process.h b/src/core/hle/kernel/process.h
index 90881054c..7b8a68610 100644
--- a/src/core/hle/kernel/process.h
+++ b/src/core/hle/kernel/process.h
@@ -45,6 +45,8 @@ union ProcessFlags {
     BitField<12, 1, u16> loaded_high; ///< Application loaded high (not at 0x00100000).
 };
 
+class ResourceLimit;
+
 class Process final : public Object {
 public:
     static SharedPtr<Process> Create(std::string name, u64 program_id);
@@ -61,6 +63,8 @@ public:
     std::string name;
     /// Title ID corresponding to the process
     u64 program_id;
+    /// Resource limit descriptor for this process
+    SharedPtr<ResourceLimit> resource_limit;
 
     /// The process may only call SVCs which have the corresponding bit set.
     std::bitset<0x80> svc_access_mask;
diff --git a/src/core/hle/kernel/resource_limit.cpp b/src/core/hle/kernel/resource_limit.cpp
new file mode 100644
index 000000000..94b3e3298
--- /dev/null
+++ b/src/core/hle/kernel/resource_limit.cpp
@@ -0,0 +1,157 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <cstring>
+
+#include "common/logging/log.h"
+
+#include "core/mem_map.h"
+#include "core/hle/kernel/resource_limit.h"
+
+namespace Kernel {
+
+static SharedPtr<ResourceLimit> resource_limits[4];
+
+ResourceLimit::ResourceLimit() {}
+ResourceLimit::~ResourceLimit() {}
+
+SharedPtr<ResourceLimit> ResourceLimit::Create(std::string name) {
+    SharedPtr<ResourceLimit> resource_limit(new ResourceLimit);
+
+    resource_limit->name = std::move(name);
+    return resource_limit;
+}
+
+SharedPtr<ResourceLimit> ResourceLimit::GetForCategory(ResourceLimitCategory category) {
+    switch (category)
+    {
+        case ResourceLimitCategory::APPLICATION:
+        case ResourceLimitCategory::SYS_APPLET:
+        case ResourceLimitCategory::LIB_APPLET:
+        case ResourceLimitCategory::OTHER:
+            return resource_limits[static_cast<u8>(category)];
+        default:
+            LOG_CRITICAL(Kernel, "Unknown resource limit category");
+            UNREACHABLE();
+    }
+}
+
+s32 ResourceLimit::GetCurrentResourceValue(u32 resource) const {
+    switch (resource) {
+        case COMMIT:
+            return current_commit;
+        case THREAD:
+            return current_threads;
+        case EVENT:
+            return current_events;
+        case MUTEX:
+            return current_mutexes;
+        case SEMAPHORE:
+            return current_semaphores;
+        case TIMER:
+            return current_timers;
+        case SHARED_MEMORY:
+            return current_shared_mems;
+        case ADDRESS_ARBITER:
+            return current_address_arbiters;
+        case CPU_TIME:
+            return current_cpu_time;
+        default:
+            LOG_ERROR(Kernel, "Unknown resource type=%08X", resource);
+            UNIMPLEMENTED();
+            return 0;
+    }
+}
+
+s32 ResourceLimit::GetMaxResourceValue(u32 resource) const {
+    switch (resource) {
+        case COMMIT:
+            return max_commit;
+        case THREAD:
+            return max_threads;
+        case EVENT:
+            return max_events;
+        case MUTEX:
+            return max_mutexes;
+        case SEMAPHORE:
+            return max_semaphores;
+        case TIMER:
+            return max_timers;
+        case SHARED_MEMORY:
+            return max_shared_mems;
+        case ADDRESS_ARBITER:
+            return max_address_arbiters;
+        case CPU_TIME:
+            return max_cpu_time;
+        default:
+            LOG_ERROR(Kernel, "Unknown resource type=%08X", resource);
+            UNIMPLEMENTED();
+            return 0;
+    }
+}
+
+void ResourceLimitsInit() {
+    // Create the four resource limits that the system uses
+    // Create the APPLICATION resource limit
+    SharedPtr<ResourceLimit> resource_limit = ResourceLimit::Create("Applications");
+    resource_limit->max_priority = 0x18;
+    resource_limit->max_commit = 0x4000000;
+    resource_limit->max_threads = 0x20;
+    resource_limit->max_events = 0x20;
+    resource_limit->max_mutexes = 0x20;
+    resource_limit->max_semaphores = 0x8;
+    resource_limit->max_timers = 0x8;
+    resource_limit->max_shared_mems = 0x10;
+    resource_limit->max_address_arbiters = 0x2;
+    resource_limit->max_cpu_time = 0x1E;
+    resource_limits[static_cast<u8>(ResourceLimitCategory::APPLICATION)] = resource_limit;
+
+    // Create the SYS_APPLET resource limit
+    resource_limit = ResourceLimit::Create("System Applets");
+    resource_limit->max_priority = 0x4;
+    resource_limit->max_commit = 0x5E00000;
+    resource_limit->max_threads = 0x1D;
+    resource_limit->max_events = 0xB;
+    resource_limit->max_mutexes = 0x8;
+    resource_limit->max_semaphores = 0x4;
+    resource_limit->max_timers = 0x4;
+    resource_limit->max_shared_mems = 0x8;
+    resource_limit->max_address_arbiters = 0x3;
+    resource_limit->max_cpu_time = 0x2710;
+    resource_limits[static_cast<u8>(ResourceLimitCategory::SYS_APPLET)] = resource_limit;
+
+    // Create the LIB_APPLET resource limit
+    resource_limit = ResourceLimit::Create("Library Applets");
+    resource_limit->max_priority = 0x4;
+    resource_limit->max_commit = 0x600000;
+    resource_limit->max_threads = 0xE;
+    resource_limit->max_events = 0x8;
+    resource_limit->max_mutexes = 0x8;
+    resource_limit->max_semaphores = 0x4;
+    resource_limit->max_timers = 0x4;
+    resource_limit->max_shared_mems = 0x8;
+    resource_limit->max_address_arbiters = 0x1;
+    resource_limit->max_cpu_time = 0x2710;
+    resource_limits[static_cast<u8>(ResourceLimitCategory::LIB_APPLET)] = resource_limit;
+
+    // Create the OTHER resource limit
+    resource_limit = ResourceLimit::Create("Others");
+    resource_limit->max_priority = 0x4;
+    resource_limit->max_commit = 0x2180000;
+    resource_limit->max_threads = 0xE1;
+    resource_limit->max_events = 0x108;
+    resource_limit->max_mutexes = 0x25;
+    resource_limit->max_semaphores = 0x43;
+    resource_limit->max_timers = 0x2C;
+    resource_limit->max_shared_mems = 0x1F;
+    resource_limit->max_address_arbiters = 0x2D;
+    resource_limit->max_cpu_time = 0x3E8;
+    resource_limits[static_cast<u8>(ResourceLimitCategory::OTHER)] = resource_limit;
+}
+
+void ResourceLimitsShutdown() {
+
+}
+
+} // namespace
diff --git a/src/core/hle/kernel/resource_limit.h b/src/core/hle/kernel/resource_limit.h
new file mode 100644
index 000000000..201ec0db9
--- /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